Burst of gamma rays from 10 billion light years away offers glimpse into the early universe – The Next Web

A short gamma ray burst known to astronomers as SGRB181123B is the second most-distant well-established SGRB ever seen, and the most distant to ever known to display an optical afterglow. Examination of this object could reveal data about the behavior of the densest stars in the Universe at a time when our Universe was still in its adolescence.

Short gamma ray burst are incredibly short-lived events (sometimes lasting for a matter of hours before fading), occurring far from Earth. These characteristics combine to make these events notoriously difficult to detect and study.

The discovery of such an event nearly two years ago led to a hasty coalition oftelescopesaimed at the enigmatic object.

We certainly did not expect to discover a distant SGRB, as they are extremely rare and very faint. We perform forensics with telescopes to understand its local environment, because what its home galaxy looks like can tell us a lot about the underlying physics of these systems, saidDr. Wen-fai Fong, assistant professor in the Department of Physics and Astronomy at Northwestern University.

[Read: The Solar Orbiter just snapped the closest-ever pictures of the Sun]

On Thanksgiving night in 2018, astronomers found a feast of data from the Neil Gehrels Swift Observatory, revealing a previously-unseenSGRB. The team managing observations for the space-borne observatory contacted astronomers at one of the words greatest ground-based telescopes,Gemini Northon Mauna Kea in Hawaii.

It was unreal. I was in New York with my family and had finished having a big Thanksgiving dinner. Just as I had gone to sleep, the alert went off and woke me up. While somewhat of a nuisance, you literally never know when youll land a big discovery like this! I immediately triggered the Gemini observations and notified Kerry. Thankfully, she happened to be observing at Keck that night and was able to rearrange her original observing plan and repoint the telescope towards the SGRB, Wen-fai recalls.

The international Gemini Observatory (a program of NSFs NOIRLab), quickly confirmed the finding, utilizing their 8.1 meter telescope onMauna Kea. Astronomers there also dated the event to the teenage years of the Universe, less than four billion years after the Big Bang.

We took advantage of the unique rapid-response capabilities and exquisite sensitivity of Gemini North and its GMOS imager to obtain deep observations of the burst mere hours after its discovery. The Gemini images were very sharp, and allowed us to pinpoint the location to a specific galaxy, saidKerry Patersonof the Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA) at Northwestern University.

These observations were reinforced by data recorded at theW.M. Keck Observatoryin Hawaii and Multi-Mirror Telescope (MMT) at Fred Lawrence Whipple Observatory on Mount Hopkins in Arizona.

This was a triumph for this international collaboration of astronomers, quickly networking several observatories, to observe this short-lived event.

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Burst of gamma rays from 10 billion light years away offers glimpse into the early universe - The Next Web

Scientists: mini-neptunes could be planets that have oceans of water – FREE NEWS

Many exoplanets known today are either super-Earths with a radius of 1.3 times the Earths radius, or mini-Neptune with 2.4 Earth radii. Mini-neptunes, which have always been less dense, have long been thought of as gaseous planets composed of hydrogen and helium. Now scientists from the Marseille Astrophysics Laboratory have explored the new possibility and presented their research in the Astrophysical Journal Letters.

Astrophysicists have suggested that the low density of mini-neptune-type planets can be explained simply by the presence of a thick layer of water, which is subject to an intense greenhouse effect.

Where does the greenhouse effect come from on these exoplanets? It is caused by radiation from a star whose radiation the planet is exposed to.

These results indicate that mini-neptuns may be super-Earths with a rocky core surrounded by supercritical water. Water takes on this state at very high pressures and temperatures. This study also suggests that two types of exoplanets super-earths and mini-neptune can form in the same way.

Another study, recently published in Astronomy & Astrophysics, looked at the effect of stellar radiation on the radius of Earth-sized planets containing water. French scientists from the Bordeaux Astrophysics Laboratory used a model of the planets atmosphere developed at the Laboratory of Dynamic Meteorology in their study.

Their results show that the size of the atmospheres of such planets increases significantly when they are exposed to a strong greenhouse effect, in accordance with studies of planets such as mini-neptune. Future observations should allow us to test these new hypotheses put forward by French scientists who are contributing to our knowledge of exoplanets.

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Scientists: mini-neptunes could be planets that have oceans of water - FREE NEWS

New view of old light adds twist to debate over universes age – EarthSky

A portion of a new picture of the oldest light in the universe, aka the cosmic microwave background. This part covers a section of the sky 50 times the moons width, representing a region of space 20 billion light-years across. Image via Atacama Cosmology Telescope/ ACT Collaboration/ Simons Foundation.

Written by Thomas Sumner for the Simons Foundation. Originally published July 15, 2020.

From a mountain high in Chiles Atacama Desert, astronomers with the National Science Foundations Atacama Cosmology Telescope (ACT) have taken a fresh look at the oldest light in the universe [otherwise known as the cosmic microwave background]. Their new observations plus a bit of cosmic geometry suggest that the universe is 13.77 billion years old, give or take 40 million years.

The new estimate matches the one provided by the standard model of the universe and measurements of the same light made by the Planck satellite. This adds a fresh twist to an ongoing debate in the astrophysics community, said Simone Aiola, first author of one of two new papers on the findings posted to arXiv.org.

In 2019, a research team measuring the movements of galaxies calculated that the universe is hundreds of millions of years younger than the Planck team predicted. That discrepancy suggested that a new model for the universe might be needed and sparked concerns that one of the sets of measurements might be incorrect. Aiola, a researcher at the Flatiron Institutes Center for Computational Astrophysics in New York City, commented:

Now weve come up with an answer where Planck and ACT agree. It speaks to the fact that these difficult measurements are reliable.

The age of the universe also reveals how fast the cosmos is expanding, a number quantified by the Hubble constant. The new measurements from the Atacama Cosmology Telescope suggest a Hubble constant of 67.6 kilometers per second per megaparsec. That means an object 1 megaparsec (around 3.26 million light-years) from Earth is moving away from us at 67.6 kilometers per second due to the expansion of the universe. This result agrees almost exactly with the previous estimate of 67.4 kilometers per second per megaparsec by the Planck satellite team, but its slower than the 74 kilometers per second per megaparsec inferred from the measurements of galaxies.

The Atacama Cosmology Telescope. Using new measurements from this telescope of the cosmic microwave background, scientists have refined calculations of the universes age. Image via Debra Kellner/ Simons Foundation.

Steve Choi of Cornell University, first author of the other paper posted to arXiv.org, said:

I didnt have a particular preference for any specific value. It was going to be interesting one way or another. We find an expansion rate that is right on the estimate by the Planck satellite team. This gives us more confidence in measurements of the universes oldest light.

The close agreement between the ACT and Planck results and the standard cosmological model is bittersweet, Aiola said:

Its good to know that our model right now is robust, but it would have been nice to see a hint of something new.

Still, the disagreement with the 2019 study of the motions of galaxies maintains the possibility that unknown physics may be at play, he said.

Like the Planck satellite, ACT peers at the afterglow of the Big Bang. This light, known as the cosmic microwave background, marks a time 380,000 years after the universes birth when protons and electrons joined to form the first atoms. Before that time, the cosmos was opaque to light.

If scientists can estimate how far light from the cosmic microwave background traveled to reach Earth, they can calculate the universes age. Thats easier said than done, though. Judging cosmic distances from Earth is hard. So instead, scientists measure the angle in the sky between two distant objects, with Earth and the two objects forming a cosmic triangle. If scientists also know the physical separation between those objects, they can use high school geometry to estimate the distance of the objects from Earth.

Subtle variations in the glow of the cosmic microwave background offer anchor points to form the other two vertices of the triangle. Those variations in temperature and polarization resulted from quantum fluctuations in the early universe that got amplified by the expanding universe into regions of varying density. (The denser patches would go on to form galaxy clusters.) Scientists have a strong enough understanding of the universes early years to know that these variations in the cosmic microwave background should typically be spaced out every billion light-years for temperature and half that for polarization. (For scale, our Milky Way galaxy is about 200,000 light-years in diameter.)

ACT measured the cosmic microwave background fluctuations with unprecedented resolution, taking a closer look at the polarization of the light. Suzanne Staggs, ACTs principal investigator and the Henry deWolf Smyth Professor of Physics at Princeton University, said:

The Planck satellite measured the same light, but by measuring its polarization in higher fidelity, the new picture from ACT reveals more of the oldest patterns weve ever seen.

As ACT continues making observations, astronomers will have an even clearer picture of the cosmic microwave background and a more exact idea of how long ago the cosmos began. The ACT team will also scour those observations for signs of physics that doesnt fit the standard cosmological model. Such strange physics could resolve the disagreement between the predictions of the age and expansion rate of the universe arising from the measurements of the cosmic microwave background and the motions of galaxies. Mark Devlin, ACTs deputy director and the Reese W. Flower Professor of Astronomy and Astrophysics at the University of Pennsylvania, said:

Were continuing to observe half the sky from Chile with our telescope. As the precision of both techniques increases, the pressure to resolve the conflict will only grow.

Bottom line: Astronomers have taken a fresh look at the oldest light in the universe, otherwise known as the cosmic microwave background. Their new observations suggest that the universe is 13.77 billion years old, give or take 40 million years.

Source: The Atacama Cosmology Telescope: DR4 Maps and Cosmological Parameters

Source: The Atacama Cosmology Telescope: A Measurement of the Cosmic Microwave Background Power Spectra at 98 and 150 GHz

Via the Simons Foundation

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New view of old light adds twist to debate over universes age - EarthSky

Security Screening Market Size, Growth Analysis by Key Manufacturers, Regions, Types and Applications, Forecast 20202026| Leidos, Nuctech, OSI…

LOS ANGELES, United States: The global Security Screening market is comprehensively analyzed in the report with the main objective of providing accurate market data and useful recommendations to help players to gain strong growth in future. The report is compiled by subject matter experts and experienced market analysts, which makes it highly authentic and reliable. Readers are provided with deep analysis of historical and future market scenarios to get sound understanding of market competition and other important aspects. The report offers exhaustive research on market dynamics, key segments, leading players, and different regional markets. It is a complete package of thorough analysis and research on the global Security Screening market.

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The report offers great insights into important segments of the global Security Screening market while concentrating on their CAGR, market size, market share, and future growth potential. The global Security Screening market is mainly segmented according to type of product, application, and region. Each segment in these categories is extensively researched to become familiar with their growth prospects and key trends. Segmental analysis is highly important to identify key growth pockets of a global market. The report provides specific information on the market growth and demand of different products and applications to help players to focus on profitable areas of the global Security Screening market.

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Here’s why today’s Google Doodle is celebrating the Turkish astrophysicist Dilhan Eryurt – Morpeth Herald

Today's Google Doodle celebrates the life of Prof. Dr. Dilhan Eryurt (Image: Google)

Today's Google Doodle celebrates Dilhan Eryurt, a Turkish astrophysicist who played a huge role in the way we understand how the Sun was formed.

But who was she, what were some of her notable achievements, and why has Google chosen today to honour her?

Here's everything you need to know.

Who was Dilhan Eryurt?

Born in 1926 in zmir - Turkey's third most populous city - Prof. Dr. Dilhan Eryurt grew up across the country, first moving to Istanbul with her family, and then on to Turkey's second city, Ankara, a few years later.

After developing an interest in mathematics in high school, Eryurt enrolled in the Istanbul University Department of Mathematics and Astronomy, and upon graduation, was assigned to open an Astronomy Department at Ankara University.

She relocated to the US to continue her graduate studies at the University of Michigan, and while there completed her doctorate at the Ankara University Department of Astrophysics, becoming Associate Professor.

From 1961, Eryurt held a position at NASA's Goddard Space Flight Centre, her appointment extra notable for the fact she was the only female astronomer working at the institution at the time.

What did she study?

Eryurt's work at Goddard revealed some facts about the Sun that were not yet understood.

For instance, she observed that the brightness of the Sun had not increased - it had in fact decreased - since its formation 4.5 billion years ago, revealing that our nearest star was much brighter and warmer in the past.

Her studies influenced the course of the scientific and engineering research aims of space flights - a new and uncharted territory at the time.

In 1969 she was awarded the Apollo Achievement Award for contributions to the Apollo 11 mission. Today (20 July) marks 51 years since Buzz Aldrin, Neil Armstrong and Michael Collins landed and walked on the moon.

Aldrin and Armstrong spent a total of 21 hours and 36 minutes on the moon, but the Apollo 11 mission itself lasted a total of eight days, three hours, 18 min, and 35 seconds.

This is likely the reason Google have chosen today to celebrate Eryurt's life; her research provided NASA engineers with crucial information for modelling solar impact on the lunar environment

She later moved on to work at the California University, where she studied the formation and development of Main Sequence stars - a continuous band of stars that appear on plots of stellar colour versus brightness.

What else did she do?

Throughout her long and successful career, Eryurt became an award-winning astronomer, picking up all sorts of nods for her contributions and work.

Other notable achievements of hers include the organising of Turkey's first National Astronomy Congress in 1968, and the establishment of the Astrophysics Department at the Middle East Technical University.

She retired in 1993 after a long career, and sadly died in September 2012 at the age of 85, suffering a heart attack in Ankara.

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Here's why today's Google Doodle is celebrating the Turkish astrophysicist Dilhan Eryurt - Morpeth Herald

A new rover to land on Mars – ScienceBlog.com

The Mars 2020 mission is scheduled to launch at the end of July. Its goal is to land the Perseverance rover on the Red Planet and collect samples in the hope of finding signs of past life.

While Mars remains an inexhaustible source of inspiration for Hollywood films, it equally fascinates NASA, which has made its exploration a priority. Since the early 2000s, the US space agency has successfully carried out eight missionsdesigned to study its geological and climate history. The next step in this programme is the upcoming launch from Cape Canaveral of a massive Atlas V rocket carrying the Perseverance rover on a new mission dubbed Mars 2020, which will land on the Red Planet on 18 February 2021.

Packed with cameras and high-tech scientific instruments, the rover, approximately the size of a car, aims to answer the question that has been nagging the astrophysics community ever since the early days of Martian exploration: could Mars have once been home to life? After focusing on the presence of water on the planet and on its habitability, Mars 2020 marks the third and latest step in a series of missions, and will be primarily dedicated to the search for signs of fossil life, says Sylvestre Maurice, an astronomer at the IRAPin Toulouse (southwestern France). With the support of around 200 scientists, engineers and technicians from several CNRS and French university laboratories,the scientist helped develop the SuperCam laser camera, one of seven scientific instruments carried by the Perseverance rover. Based on many of the features of the Curiosity rovers ChemCam deployed on Mars in 2012, SuperCam was enhanced with new functionalities such as Raman and infrared spectrometers. These techniques, the first of their kind to be used on the Red Planet, can identify bonds between atoms and the way in which molecules are organised. As a result, they are able to detect complex structures favourable to the preservation of biosignatures in SuperCams targets, he explains.

To maximise their chances in the search for Martian biosignatures, the Mars 2020 team chose the Jezero crater as their landing site. Approximately 3.5 billion years ago, this area, 45 kilometres in diameter, was home to a vast lake to which several rivers converged, forming deltas whose remains are still visible today. The very early presence of water, together with extensive sedimentary deposits, makes Jezero a particularly promising environment for the detection of traces of life. The site also includes a wide range of geological features, which will help Mars 2020 achieve its other primary goal, namely the collection of some thirty soil core and rock samples reflecting the geological diversity of the planet. Once the samples have been enclosed in metal tubes kept inside the rover, they will be sealed and stored on the Martian surface, and eventually brought back to Earth during a future sample return mission scheduled by 2030, Maurice explains.

NASA/JPL-Caltech/MSSS/JHU-APL/ESA

This unprecedented sampling operation will be carried out using the SuperCam instrument. Its high-resolution colour camera attached atop Perseverances mast will make it possible to accurately determine the geological and environmental context associated with each sample of rock or regolith thanks to the analysis performed by the instruments three spectrometers.In addition, SuperCam will be the very first scientific instrument sent to Mars to be equipped with a microphone. By listening to the impact on the rocks each time the laser is fired, this system will provide information about the hardness of the geological samples targeted, Maurice says. The device will also be used to pick up the sound of the Martian wind and detect possible signs of wear and tear to the equipment by continuously recording the noises made by the rover.

Filled with cutting-edge technology, the SuperCam laser camera took five long years to develop by several French research laboratories. Although from the outside the instrument looks like Curiositys ChemCam, which our team had previously helped to design, it contains three additional analysis technologies packed into exactly the same volume. This required the miniaturisation of numerous components, explains Pernelle Bernardi, a systems engineer at the LESIA,in charge of the specifications and performance of the SuperCam. This was a major challenge that the French team met with flying colours. However, just as the production of the flight model to be mounted on the rover neared completion, things went badly wrong when the optical component of the instrument was being tested inside a heat chamber in November 2018. The temperature rose to nearly 250 C, well above the acceptable limits, quite literally roasting the instrument.

Following a crisis meeting with US mission officials and representatives from the French space agency, CNES,the decision was taken to rebuild the entire laser camera, using all the available spare parts. The French team worked flat out, day and night, and rebuilt the instrument in six months, even managing to enhance its performance. The primary mirror of the first SuperCams telescope had a tendency to deform when cold, which resulted in a significant widening of the focus point of the infrared laser beam, Bernardi explains. The November 2018 incident therefore gave us the opportunity to replace this defective mirror and thereby significantly improve the laser shot.

Completed in June 2019, the upgraded version of the SuperCam was then shipped to NASAs Jet Propulsion Laboratory in California in order to be attached to the top of the rover mast. We visited the site several times last year to ensure that the instruments laser beams were still perfectly aligned during tests carried out in an environment very close to that of Mars, and it was indeed the case, says Bernardi, who was awarded the CNRS 2020 Crystal Medal for her key role in the construction of the device. A few weeks before the Covid-19 crisis broke out, the fully-assembled rover had reached the Kennedy Space Center at Cape Canaveral and was docked to the descent vehicle. It was then placed in the capsule that will enter the Martian atmosphere, this structure being itself attached to the cruise stage, which will fly the entire system to its final destination. Sheltering behind its heat shield, Perseverance is now waiting for the green light from NASA to begin its long journey to Mars.

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A new rover to land on Mars - ScienceBlog.com

Exploring the Fundamental Mysteries of the Universe by Seeing the Invisible – SciTechDaily

Michael Troxel has always liked puzzles, especially challenging ones. Which is fortunate, since his job is solving some of the most perplexing, fundamental mysteries of the universe.

At some point in middle school I asked myself, Whats the hardest thing that I could try to do? he said. And at that point the hardest thing I knew about was astrophysics, so I think that was probably the first motivation for choosing this career, if Im honest. But that was before I understood what it actually meant.

A cosmologist and assistant professor in the Department of Physics, Troxel has spent the past two years as the cosmology analysis coordinator in the Dark Energy Surveyan international collaboration involving 500 scientists analyzing a massive dataset of about 400 million celestial objects. It has been what I think is one of the most complex and difficult analyses ever performed in cosmology, which has only been possible with the contributions and leadership of dozens of my colleagues, Troxel said. The outcome will span about 30 published research papers with more than 200 contributing scientists.

Today, in recognition of his contributions to the field, Troxel was granted an award through the Department of Energy Early Career Research Program. Founded to bolster the nations scientific workforce by providing support to exceptional researchers during crucial early career years, when many scientists do their most formative work, the program will support 76 scientists in 2020. It is a welcome validation that my time supporting this project has been well spent, Troxel said. It will also give my research group the resources to tackle some of the hardest problems we face in cosmology.

The award offers five years of funding for a specific project, which Troxel will partly use to support his work on a successor to the Dark Energy Survey: research using the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST), which is scheduled to begin operations in 2023, within the Dark Energy Science Collaboration (DESC). Located in Cerro Pachon, Chile, the facility is one of the three large, state-of-the-art telescopes that will come online in the coming decade, including the Nancy Grace Roman Space Telescope that Troxels group also works with. Rubin and Roman will do many of the same things that the Dark Energy Survey does, but 10 times better, Troxel said.

This DES collaboration map of dark matter was made from gravitational lensing measurements. Credit: Chihway Chang/Kavli Institute for Cosmological Physics at the University of Chicago/DES Collaboration

All focus, in part, on the two most pressing cosmological mysteries left to solve: dark matter and dark energy. Theyre the pieces of the universe that we just dont understand, Troxel said. And a bit frighteningly, they seem to make up 95 percent of the universe.

The first, dark matter, is difficult to research because scientists have yet to see itit doesnt interact with light in the way ordinary matter does. But it does interact with gravity, and current astrophysical modelswhich have been very successful at predicting how the universe has evolvedimply that there is five times as much matter as we can see in the form of this dark matter.

Troxel specializes in gravitational lensing, or how gravity bends the path of light and distorts images of distant galaxies. By taking large-scale images of the universe from observatories like Rubin and Roman and analyzing those distortions, he can map where dark matter is located. Through the Dark Energy Survey, Troxel and others have made such maps for about an eighth of the sky. Rubin will allow them to map the entire southern hemisphere.

The other mystery, dark energy, involves the expansion of the universe. Since the Big Bang, all of the universes cosmological objects have been moving away from each other. Until the last few decades, scientists largely expected that the objects would slow down due to the gravitational force pulling them back together. But the opposite is happening.

What we observed is that instead of slowing down, everything is speeding up and accelerating away from each other, Troxel said. This is like throwing a ball up in the air and instead of having it fall back down, it starts shooting up faster and faster.

Duke cosmologists pose together. Troxel is third from left. Walter is to his right and Scolnic is the last on the right. Credit: Duke University

Since the acceleration is inexplicable through gravity from massive objects, scientists have concluded that there must be another force or component of the universe at play. In fact, this other component of the universe makes up 70 percent of the dynamics of the universe, Troxel said. It is also invisible to observation, but through gravitational lensing, Troxel and his colleagues can use data from the Rubin and other telescopes to learn more about it.

With the funding from his Department of Energy Award, Troxel said he will be able to hire another graduate student and postdoc to support Dukes cosmology research, which also includes professors Dan Scolnic and Chris Walter, expanding the departments recent focus on the field. One of the benefits for students is that they will have the opportunity to visit the observatory in Chile as the commissioning of Rubin starts.

Its those opportunities to support future scientists that are most meaningful to Troxel. A first-generation student, Troxel credits those who supported his career for his current success. My path to where I am now was not easy, and I only made it due to the support of my teachers and mentors, he said.

But he also hopes to welcome a more diverse group of students into cosmology. It was only last week [with the US Supreme Court ruling on Title VII], for the first time in my life, that I am protected at the national level from being fired from my job solely for who I am, said Troxel, who is LGBTQ.

The story of modern physics and cosmology has been one of turning around our perspectives and viewing the physical world in a new light, leading to fundamental new insights about how the world works, he added. Physics and cosmology benefit from new and diverse perspectives, but we must ensure that the field is worthy of those new voices. The most rewarding part of my role now as a teacher at Duke is to help make sure the next generation of diverse voices are heard and supported while they find their own paths to grappling with the mysteries of the universe.

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Exploring the Fundamental Mysteries of the Universe by Seeing the Invisible - SciTechDaily

How Galaxies Die: New Insights Into Galaxy Halos, Black Holes, and Quenching of Star Formation – SciTechDaily

A simple model explains a wide range of observations by describing a contest between galaxy halos and their central black holes that eventually turns off star formation.

Astronomers studying galaxy evolution have long struggled to understand what causes star formation to shut down in massive galaxies. Although many theories have been proposed to explain this process, known as quenching, there is still no consensus on a satisfactory model.

Now, an international team led by Sandra Faber, professor emerita of astronomy and astrophysics at UC Santa Cruz, has proposed a new model that successfully explains a wide range of observations about galaxy structure, supermassive black holes, and the quenching of star formation. The researchers presented their findings in a paper published on July 1, 2020, in the Astrophysical Journal.

The model supports one of the leading ideas about quenching which attributes it to black hole feedback, the energy released into a galaxy and its surroundings from a central supermassive black hole as matter falls into the black hole and feeds its growth. This energetic feedback heats, ejects, or otherwise disrupts the galaxys gas supply, preventing the infall of gas from the galaxys halo to feed star formation.

The idea is that in star-forming galaxies, the central black hole is like a parasite that ultimately grows and kills the host, Faber explained. Thats been said before, but we havent had clear rules to say when a black hole is big enough to shut down star formation in its host galaxy, and now we have quantitative rules that actually work to explain our observations.

The basic idea involves the relationship between the mass of the stars in a galaxy (stellar mass), how spread out those stars are (the galaxys radius), and the mass of the central black hole. For star-forming galaxies with a given stellar mass, the density of stars in the center of the galaxy correlates with the radius of the galaxy so that galaxies with bigger radii have lower central stellar densities. Assuming that the mass of the central black hole scales with the central stellar density, star-forming galaxies with larger radii (at a given stellar mass) will have lower black-hole masses.

What that means, Faber explained, is that larger galaxies (those with larger radii for a given stellar mass) have to evolve further and build up a higher stellar mass before their central black holes can grow large enough to quench star formation. Thus, small-radius galaxies quench at lower masses than large-radius galaxies.

That is the new insight, that if galaxies with large radii have smaller black holes at a given stellar mass, and if black hole feedback is important for quenching, then large-radius galaxies have to evolve further, she said. If you put together all these assumptions, amazingly, you can reproduce a large number of observed trends in the structural properties of galaxies.

This explains, for example, why more massive quenched galaxies have higher central stellar densities, larger radii, and larger central black holes.

Based on this model, the researchers concluded that quenching begins when the total energy emitted from the black hole is approximately four times the gravitational binding energy of the gas in the galactic halo. The binding energy refers to the gravitational force that holds the gas within the halo of dark matter enveloping the galaxy. Quenching is complete when the total energy emitted from the black hole is twenty times the binding energy of the gas in the galactic halo.

Faber emphasized that the model does not yet explain in detail the physical mechanisms involved in the quenching of star formation. The key physical processes that this simple theory evokes are not yet understood, she said. The virtue of this, though, is that having simple rules for each step in the process challenges theorists to come up with physical mechanisms that explain each step.

Astronomers are accustomed to thinking in terms of diagrams that plot the relations between different properties of galaxies and show how they change over time. These diagrams reveal the dramatic differences in structure between star-forming and quenched galaxies and the sharp boundaries between them. Because star formation emits a lot of light at the blue end of the color spectrum, astronomers refer to blue star-forming galaxies, red quiescent galaxies, and the green valley as the transition between them. Which stage a galaxy is in is revealed by its star formation rate.

One of the studys conclusions is that the growth rate of black holes must change as galaxies evolve from one stage to the next. The observational evidence suggests that most of the black hole growth occurs in the green valley when galaxies are beginning to quench.

The black hole seems to be unleashed just as star formation slows down, Faber said. This was a revelation, because it explains why black hole masses in star-forming galaxies follow one scaling law, while black holes in quenched galaxies follow another scaling law. That makes sense if black hole mass grows rapidly while in the green valley.

Faber and her collaborators have been discussing these issues for many years. Since 2010, Faber has co-led a major Hubble Space Telescope galaxy survey program (CANDELS, the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey), which produced the data used in this study. In analyzing the CANDELS data, she has worked closely with a team led by Joel Primack, UCSC professor emeritus of physics, which developed the Bolshoi cosmological simulation of the evolution of the dark matter halos in which galaxies form. These halos provide the scaffolding on which the theory builds the early star-forming phase of galaxy evolution before quenching.

The central ideas in the paper emerged from analyses of CANDELS data and first struck Faber about four years ago. It suddenly leaped out at me, and I realized if we put all these things togetherif galaxies had a simple trajectory in radius versus mass, and if black hole energy needs to overcome halo binding energyit can explain all these slanted boundaries in the structural diagrams of galaxies, she said.

At the time, Faber was making frequent trips to China, where she has been involved in research collaborations and other activities. She was a visiting professor at Shanghai Normal University, where she met first author Zhu Chen. Chen came to UC Santa Cruz in 2017 as a visiting researcher and began working with Faber to develop these ideas about galaxy quenching.

She is mathematically very good, better than me, and she did all of the calculations for this paper, Faber said.

Faber also credited her longtime collaborator David Koo, UCSC professor emeritus of astronomy and astrophysics, for first focusing attention on the central densities of galaxies as a key to the growth of central black holes.

Among the puzzles explained by this new model is a striking difference between our Milky Way galaxy and its very similar neighbor Andromeda. The Milky Way and Andromeda have almost the same stellar mass, but Andromedas black hole is almost 50 times bigger than the Milky Ways, Faber said. The idea that black holes grow a lot in the green valley goes a long way toward explaining this mystery. The Milky Way is just entering the green valley and its black hole is still small, whereas Andromeda is just exiting so its black hole has grown much bigger, and it is also more quenched than the Milky Way.

Reference: Quenching as a Contest between Galaxy Halos and Their Central Black Holes by Zhu Chen, S. M. Faber, David C. Koo, Rachel S. Somerville, Joel R. Primack, Avishai Dekel, Aldo Rodrguez-Puebla, Yicheng Guo, Guillermo Barro, Dale D. Kocevski, A. van der Wel, Joanna Woo, Eric F. Bell, Jerome J. Fang, Henry C. Ferguson, Mauro Giavalisco, Marc Huertas-Company, Fangzhou Jiang, Susan Kassin, Lin Lin, F. S. Liu, Yifei Luo, Zhijian Luo, Camilla Pacifici, Viraj Pandya, Samir Salim, Chenggang Shu, Sandro Tacchella, Bryan A. Terrazas and Hassen M. Yesuf, 7 July 2020, Astrophysical Journal.DOI: 10.3847/1538-4357/ab9633

In addition to Faber, Chen, Koo, and Primack, the coauthors of the paper include researchers at some two dozen institutions in seven countries. This work was funded by grants from NASA and the National Science Foundation.

Link:

How Galaxies Die: New Insights Into Galaxy Halos, Black Holes, and Quenching of Star Formation - SciTechDaily

Spacewatch: Black holes, comets and key dates – Cosmos

The release of the closest-ever images of the Sun understandably grabbed the headlines this week (you can read Richard A Lovetts report for Cosmos here) but there was other news of note. Here are some announcements that took our fancy.

Astronomers reported watching as a supermassive black holes own corona, the ultrabright, billion-degree ring of high-energy particles that encircles a black holes event horizon, was abruptly destroyed.

The cause is unclear, though they guess it was a star caught in the black holes gravitational pull. Like a pebble tossed into a gearbox, it may have ricocheted through the disc of swirling material, causing everything in the vicinity, including the coronas high-energy particles, to suddenly plummet into the black hole.

The result was a precipitous and surprising drop in the black holes brightness, by a factor of 10,000, in under just one year.

We expect that luminosity changes this big should vary on timescales of many thousands to millions of years, says Erin Kara, from Massachussetts Institute of Technlogy, but in this object, we saw it change by 10,000 over a year, and it even changed by a factor of 100 in eight hours, which is just totally unheard of and really mind-boggling.

Following the coronas disappearance, Kara and colleagues watched as the black hole began to slowly pull together material from its outer edges to reform its swirling accretion disc. In just a few months it was able to generate a new corona, with close to its original luminosity.

Journal abstract

Another group of astronomers at the Atacama Cosmology Telescope (ACT) in Chile took a fresh look at the oldest light in the Universe and, combining these observations with a bit of cosmic geometry suggest the Universe is 13.77 billion years old, give or take 40 million years.

The new estimate matches one provided by the Standard Model of the Universe and measurements of the same light made by the Planck satellite. This adds a fresh twist to an ongoing debate in the astrophysics community, says Simone Aiola, from the Centre for Computational Astrophysics in New York.

In 2019, a research team measuring the movements of galaxies calculated that the universe is hundreds of millions of years younger than the Planck team predicted. That discrepancy suggested that a new model for the Universe might be needed and sparked concerns that one of the sets of measurements might be incorrect.

Now weve come up with an answer where Planck and ACT agree, says Aiola. It speaks to the fact that these difficult measurements are reliable.

Journal abstract

Astrophysicists from Russia, South Korea and the US are suggesting that carbon is an indication of how long a comet has been in our Solar System; the less carbon, the longer its been in the proximity of the Sun.

The proof, they say, is the comet ATLAS (C/2019 Y4), which approached the Earth in May but disintegrated, displaying a major outbreak of the carbonaceous particles.

ATLAS was expected to be the brightest comet of 2020, visible from the Earth with a naked eye. However, instead of observing the comet itself, we witnessed its disintegration, says Ekaterina Chornaya, from Russias Far Eastern Federal University.

Luckily, we had begun photometric and polarimetric studies before the process started, and because of that, we are able to compare the composition of the coma before and after the disintegration.

The researchers say the polarimetric response of the particles from Comet ATLAS matches that of one of the brightest comets in the history of Earth Comet Hale-Bopp, or C/1995 O1.

Journal abstract

To finish, a couple of important dates were revealed this week.

The Japan Aerospace Exploration Agency (JAXA) and the Australian Space Agency jointly announced that the Hayabusa2 spacecraft containing samples from the asteroid Ryugu will arrive back on Earth in Woomera, South Australia, on 6 December this year. (You can read our most recent coverage of the mission here).

And NASA announced a new target date of 31 October 2021 for the launch of the James Webb Space Telescope from French Guiana. The ongoing coronavirus COVID-19 pandemic and technical challenges have required a move from the original planned launch in March.

See the rest here:

Spacewatch: Black holes, comets and key dates - Cosmos

An open letter to Australia’s Education Minister Dan Tehan signed by 73 senior professors – The Conversation AU

This open letter is written in response to the Australian governments proposed reforms to the university sector, announced by Education Minister Dan Tehan on June 19, 2020. The so-called job-ready graduates package seeks to make courses in areas such as science, maths and teaching cheaper to encourage more students to get degrees in what the government sees to be job-growth areas. By contrast, fees for many humanities courses will more than double.

Read more: Fee cuts for nursing and teaching but big hikes for law and humanities in package expanding university places

Dear Minister,

We write regarding the recently proposed changes to Australian higher education funding. We welcome the much-needed intent to boost domestic student enrolments. But the complicated and inconsistent nature of the funding changes and the intent to identify work-relevant qualifications risk further undermining the nations fourth largest export industry at a time the Australian economy can ill afford it.

As laureate researchers spanning a wide range of disciplines in science, technology, engineering and mathematics (STEM), humanities, arts and social sciences (HASS) and other fields, we believe this proposal will bring severe negative national consequences for future university training. It is likely to have the unintentional effect of amplifying inequities in higher education, and will work against the very economic goals it is trying to achieve.

Successive Australian governments have refrained from picking winners in industry, but here we see that approach applied to education precisely at a time when future needs are becoming more heterogeneous and unpredictable.

Bracketing the humanities and social sciences as a category deemed less useful for future employment flies in the face of what we see among leaders in both politics and business. More Liberal frontbenchers, for instance, have received an arts degree than studied economics.

Business leader Jennifer Westacott, Chief Executive of the Business Council of Australia, emphasises the importance of a humanities education and Deloitte Access Economics stresses its value in teaching students to ask innovative questions, think critically for themselves, explain what they think, form ethical constructs and communicate flexibly across a range of perspectives.

Read more: If the government listened to business leaders, they would encourage humanities education, not pull funds from it

The proposed changes reflect an outdated view of both HASS and STEM. Each is concerned with advancing our understanding of the world and providing the intellectual framework and critical thinking skills needed to acquire that understanding.

These will be critical for creating a flexible, responsive workforce in an increasingly diverse economy. In the face of our uncertainty about where future needs will lie, what we can be sure of is that interdisciplinary training will become ever more important.

It is unhealthy for a democratic and inclusive society to make some fields the province of those who can pay more for them.

Different pricing is unhealthy for every academic field: the best outcomes grow from an optimal match between disciplines and the talents and interests of those who want to study them, undistorted by arbitrary price signals.

Even within its own premises, many of the subjects it claims to promote (such as maths) will suffer severe cuts. Universities may be discouraged from offering such subjects, or boost their offerings in fields that are cheaper to teach, to cross-subsidise the more expensive courses.

The recently floated patch of an integrity unit to prevent this would simply increase regulatory burdens and consume resources better spent directly on education.

Complex sets of discipline categories greatly reduce the transparency and efficiency of the system. Energy will needlessly be diverted into defining subjects into or out of categories favoured or disfavoured by the funding model.

Universities need to be able to plan intelligently, delivering world-class education and training in an uncertain 21st century. Well-intended but counter-productive distortions in the funding model will not help.

The national economic impacts of these decisions have not been convincingly worked through.

A forward-looking policy of higher-education funding thus needs to do three things:

1. Avoid complex different policies

These will necessitate increased regulation, while failing to achieve either the diversion of student numbers that are sought, or the social and technological goal of better preparing our students for the future.

The simplest way to achieve this is to reinstate a flat HECS rate a simple way to optimise the match between talent, interest and enrolment without distortions from family wealth, easy to administer, and immune from highly uncertain guesses about future trends.

2. Increase funding to universities in real terms

This will assure the growth in quality and capacity of one of Australias transformative success stories and its fourth greatest export. This should be a real increase, not funded from an arbitrary subset of future students at the outset of their careers in a time of great uncertainty.

We appreciate that the COVID-19 epidemic has put unprecedented pressures on the budget, but the need for greater support to our universities is more necessary than ever during this present time of huge financial stress, caused by the plummeting income of overseas students. Wise investment now will pay huge dividends later in the economic, scientific, social and cultural growth of the nation.

3. Integrate the systems for funding university and vocational education, which have long drifted apart

This will ensure every school-leaver has access to the level of training they need for a successful career. What is really needed is not a vocational approach to university education but a more systematic and thoughtful approach to vocational education.

In the modern economy, all kinds of work, including trades, require a broader range of skills than in the past, including communications and IT skills. We have much to learn here from the success of countries like Germany in integrating these two systems of higher education.

We urge this current piece of legislation be shelved in its current form, and replaced by one that has been drafted after proper consultation with a range of experts in the sector who are able to devise an optimal mechanism for building this vital part of our societys future.

Yours sincerely,

Professor Nicholas Evans, School of Culture, History and Language, Australian National University

Professor Chris Turney, Faculty of Science, University of New South Wales

Professor Joy Damousi, President, Australian Academy of the Humanities

Professor Christine Beveridge, School of Biological Sciences, University of Queensland

Professor John Quiggin, School of Economics, University of Queensland

Professor Matthew England, Climate Change Research Centre, The University of New South Wales

Professor Mathai Varghese, Mathematical Sciences, The University of Adelaide

Professor Sue O'Connor, Archaeology and Natural History, The Australian National

Professor Barry Brook, School of Biological Sciences, University of Tasmania

Professor Bostjan Kobe, School of Chemistry and Molecular Biosciences, University of Queensland

Professor Michael Bird, College of Science & Engineering, James Cook University

Professor Ben Andrews, Mathematical Sciences Institute, Australian National University

Professor Ian Reid, School of Computer Science, University of Adelaide

Professor Trevor J McDougall, School of Mathematics and Statistics, University of New South Wales

Professor Tamara Davis, School of Mathematics and Physics, University of Queensland

Professor Steven Sherwood, Climate Change Research Centre, University of New South Wales

Professor Peter Goodyear, Centre for Research on Learning and Innovation, The University of Sydney

Professor Madeleine JH van Oppen, Institute of Marine Science, The University of Melbourne

Professor Christopher Barner-Kowollik, School of Chemistry &Physics, Queensland University of Technology

Professor Hong Hao, Centre for Infrastructural Monitoring and Protection, Curtin University

Professor Paul S.C. Tacon, Griffith Centre for Social and Cultural Research, Griffith University

Professor Matthew Bailes, Centre for Astrophysics and Supercomputing, Swinburne University of Technology

Professor Warwick Anderson, Faculty of Arts and Social Sciences, University of Sydney

Professor Malcolm McCulloch, Oceans Institute, The University of Western Australia

Professor Lynette Russell, Monash Indigenous Studies Centre, Monash University

Professor Ping Koy Lam, Research School of Physics, The Australian National University

Professor Alexandra Y. Aikhenvald, College of Arts, Society & Education, James Cook University

Professor Chennupati Jagadish, Research School of Physics, Australian National University

Professor Margaret Jolly, School of Culture, History and Language, The Australian National University

Professor Justin Marshall, Queensland Brain Institute, University of Queensland

Professor Jason Mattingley, Queensland Brain Institute, The University of Queensland

Professor George Zhao, Faculty of Engineering,Architecture and Information Technology, The University of Queensland

Professor John Dryzek, Institute for Governance & Policy Analysis, University of Canberra

Professor Brad Sherman, School of Law, University of Queensland

Professor Richard G. Roberts, ARC Centre of Excellence for AustralianBiodiversity and Heritage, University of Wollongong

Professor Geoffrey Ian McFadden, School of BioSciences, University of Melbourne, University of Melbourne

Professor Peter Taylor, ARC Centre of Excellence for Mathematical andStatistical Frontiers, The University of Melbourne

Professor Belinda Medlyn Hawkesbury, Hawkesbury Institute for the Environment, Western Sydney University

Professor Fedor Sukochev, School of Mathematics and Statistics, University of New South Wales

Professor Michelle Coote, Research School of Chemistry, Australian National University

Professor Michael Tobar, Department of Physics, The University of Western Australia

Professor Hilary Charlesworth, Melboure Law School, The University of Melbourne

Professor Mark Finnane, School of Humanities, Languages and Social Science, Griffith University

Professor Katherine Demuth, Faculty of Medicine, Macquarie University

Professor Jolanda Jetten, School of Psychology, The University of Queensland

Professor Jon Barnett, Faculty of Science, Melbourne University

Professor Matthew Spriggs, College of Arts and Social Sciences, The Australian National University

Professor Kate Smith-Miles, School of Mathematics and Statistics, The University of Melbourne

Professor Shizhang Qiao, School of Chemical Engineering and Advanced Materials, The University of Adelaide

Professor Peter Visscher, Institute for Molecular Bioscience, The University of Queensland

Professor Zheng-Xiang, Faculty of Science and Engineering, Curtin University

Professor Toby Walsh, School of Computer Science & Engineering, UNSW Sydney

Professor Martina Stenzel, ARC Training Centre for Chemical Industries, University of New South Wales

Professor David James, School of Life and Environmental Science, University of Sydney

Professor Ross Buckley, School of Law, University of New South Wales

Professor Alex Haslam, School of Psychology, University of Queensland

Professor Stuart Wyithe, School of Physics, University of Melbourne

Professor Sara Dolnicar, Faculty of Business, The University of Queensland

Professor Lesley Head, School of Geography, University of Melbourne

Professor Glenda Sluga, Department of History, University of Sydney

Professor Ann McGrath, School of History, Australian National University

Professor Bernard Degnan, School of Biological Sciences, University of Queensland

Professor Philip Boyd, Institute for Marine and Antarctic Studies, University of Tasmania

Professor Richard Shine, Department of Biological Sciences, Macquarie University

Professor Loeske Kruuk, Research School of Biology, Australian National University

Professor Kaarin Anstey, ARC Centre of Excellence in Population Ageing Research, UNSW

Professor Paul Mulvaney, School of Chemistry, University of Melbourne

Professor Lianzhou Wang, School of Chemical Engineering, The University of Queensland

Professor Peter Waterhouse, Centre for Agriculture and the Bioeconomy, Queensland University of Technology

Professor George Willis, Mathematical and Physical Science, University of Newcastle

Read more from the original source:

An open letter to Australia's Education Minister Dan Tehan signed by 73 senior professors - The Conversation AU

Texas Tech astrophysics researcher has projects approved with Hubble Space Telescope – LubbockOnline.com

For A-J Media

For Texas Tech and the Hubble Space Telescope, three may be this year's magic number. After all, there have now been three exciting events this academic year tying the two together.

First, Paul Bennet became the first Texas Tech graduate student to be awarded Hubble observation time as a principal investigator.

Second, Texas Tech was selected to host a special commemorative event later this fall in honor of the Hubble Space Telescope's three decades in space.

And now, Tech postdoctoral research fellow Liliana Rivera Sandoval has achieved the very rare distinction of being awarded two observing times on the Hubble Space Telescope in the upcoming cycle, together with a grant to analyze existing observations. In fact, Rivera Sandoval is one of only 11 researchers worldwide to have been granted at least three proposals in the same observing cycle in the last decade.

"Since Hubble's proposal-selection process is highly competitive, it is very rare for the same person to win three awards as a PI in the same program cycle," said Sung-Won Lee, professor and chair of the Department of Physics & Astronomy. "It is a highly recognized achievement for Liliana to receive multiple observing times on the Hubble Space Telescope."

Rivera Sandoval will use her observing times on the telescope for three different research projects. In collaboration with fellow researchers at Texas Tech, across the U.S., and in Canada, Europe and Australia, Rivera Sandoval will study accreting white dwarfs and other compact binaries in globular clusters.

White dwarfs

In the life cycle of sun-like stars, or a few times in more massive ones, the white dwarf stage represents the end of their evolution. Stars, like our sun, eventually run out of nuclear fuel and shrink to smaller, fainter stars about the size of Earth. But with the mass of a sun-sized object packed into such a comparatively tiny volume, the gravity on the surface of a white dwarf is several hundred thousand times that of Earth.

Most stars typically exist in pairs called "binary systems." But what happens when both

stars in a binary system are white dwarfs? If the stars are close enough, the gravity of the more massive white dwarf can pull matter away from its companion star, leading to what astronomers call the accretion process.

A few dozen such binaries have been identified in our solar neighborhood, but never in other environments of our galaxy. That's what two of Rivera Sandoval's projects intend to investigate.

"Until now, these binaries have been predicted to exist in numerous amounts in globular clusters due to the high stellar densities there, but none have been confirmed so far," Rivera Sandoval said. "First, we want to confirm whether these ultracompact, accreting double-white dwarf binaries exist in globular clusters, as has been theorized, and in what amount so we can compare to models.

"We also want to investigate their properties and their mass-accretion process. We aim to explore whether there are differences with systems in the solar neighborhood, as that will give us direct clues on how dense stellar environments affect the creation and evolution of these binaries."

Because of their short orbits, typically less than one hour, double-white dwarf binary systems also are expected to be sources of low-frequency gravitational waves. Gravitational waves are different from electromagnetic waves and represent another tool astronomers can use to study exotic objects in the universe. So, by detecting these systems as gravitational wave sources, scientists ultimately can obtain important information about their components and their history.

"These binaries also are relevant because they are potential progenitors of supernovae type Ia, the type of supernovae that are used to measure distances," Rivera Sandoval said. "So, by using ultraviolet observations with the Hubble Space Telescope, we hope not only to confirm their existence in globular clusters for the first time, but also to discover many of these systems.

"Getting Hubble Space Telescope observations was crucial for our projects because of the unique filters and instruments it has, but also because it is the only telescope capable of resolving single stars in crowded stellar environments."

Cataclysmic variables

Rivera Sandoval's third project surveys globular clusters for a different type of binary system. Known as cataclysmic variables (CVs), these are binary systems in which a white dwarf accretes mass from a sun-like star.

"Unlike the double-white dwarf binaries, CVs have been confirmed in globular clusters, but many questions are still open," Rivera Sandoval explained.

Among those questions is why the numbers of detected CV systems and the number predicted to exist are substantially different. One potential explanation for this difference is observational biases. This means the way scientists look for these CVs can affect how many they find.

"With our project, we aim to eliminate these biases for the first time," Rivera Sandoval said. "We expect to identify the missing CV population by implementing a technique that uses different types of Hubble Space Telescope images.

"It also is unclear whether there are one or two different populations of CVs in a given cluster, and our survey will allow us to investigate that. We will study different clusters with different properties from each other. Furthermore, we don't know the orbital period distribution of CVs in globular clusters, but we intend to explore that with the Hubble Space Telescope data as well."

The project also will allow Rivera Sandoval and her team to study other types of compact binaries, such as those harboring neutron stars or even black holes.

"This is an academic dream come true," she said.

Read more from the original source:

Texas Tech astrophysics researcher has projects approved with Hubble Space Telescope - LubbockOnline.com

Fresh Twist to Debate Over Universes Age From New View of the Oldest Light in the Universe – SciTechDaily

The Atacama Cosmology Telescope measures the oldest light in the universe, known as the cosmic microwave background. Using those measurements, scientists can calculate the universes age. Credit: Image courtesy of Debra Kellner

Atacama Cosmology Telescope findings suggest the universe is 13.8 billion years old.

From a mountain high in Chiles Atacama Desert, astronomers with the National Science Foundations Atacama Cosmology Telescope have taken a fresh look at the oldest light in the universe. Their new observations, plus a bit of cosmic geometry, suggest that the universe is 13.77 billion years old, give or take 40 million years.

The new estimate matches the one provided by the standard model of the universe and measurements of the same light made by the Planck satellite, a space-based observatory that ran from 2009-2013.

This adds a fresh twist to an ongoing debate in the astrophysics community, saidSimone Aiola, first author of one of two new papers on the findings posted July 15 to arXiv.org. The trouble is that research teams measuring the movements of galaxies have calculated that the universe is hundreds of millions of years younger than the Planck team predicted. That discrepancy suggested that a new model for the universe might be needed, and sparked concerns that one of the sets of measurements might be incorrect.

Now weve come up with an answer where Planck and the Atacama Cosmology Telescope agree, said Aiola, a researcher at the Flatiron Institutes Center for Computational Astrophysics in New York City. It speaks to the fact that these difficult measurements are reliable.

A portion of a new picture of the oldest light in the universe taken by the Atacama Cosmology Telescope. This part covers a section of the sky 50 times the moons width, representing a region of space 20 billion light-years across. The light, emitted just 380,000 years after the Big Bang, varies in polarization (represented here by redder or bluer colors). Astrophysicists used the spacing between these variations to calculate a new estimate for the universes age. Credit: Image courtesy of ACT Collaboration

The age of the universe also reveals how fast the cosmos is expanding, a number called the Hubble constant. The Atacama measurements suggest a Hubble constant of 67.6 kilometers per second per megaparsec. This result agrees almost exactly with the previous estimate of 67.4 by the Planck satellite team, but its slower than the 74 inferred from the measurements of galaxies.

Making this independent measurement is really exciting because theres a mystery in the field, and this helps us sharpen our understanding of that mystery, said Jeff McMahon, an associate professor of astronomy and astrophysics at the University of Chicago who led the design of thedetectors and other new technologies used to make this measurement. This confirms the ongoing discrepancy. And we still have much more data to analyze, so this is just the beginning.

Assoc. Prof. Jeff McMahon

The close agreement between the Atacama Cosmology Telescope and Planck results and the standard cosmological model is bittersweet, Aiola said: Its good to know that our model right now is robust,but it would have been nice to see a hint of something new. Still, the disagreement with the 2019 study of the motions of galaxies maintains the possibility that unknown physics may be at play, he said.

Like the Planck satellite and its earthbound cousin the South Pole Telescope, the Atacama Telescope peers at the afterglow of the Big Bang. This light, known as the cosmic microwave background, or CMB, marks a time 380,000 years after the universes birth, when protons and electrons joined to form the first atoms. Before that time, the cosmos was opaque to light.

If scientists can estimate how far light from the CMB traveled to reach Earth, they can calculate the universes age. Thats easier said than done, though. Judging cosmic distances from Earth is hard. So instead, scientists measure the angle in the sky between two distant objects, with Earth and the two objects forming a cosmic triangle. If scientists also know the physical separation between those objects, they can use high school geometry to estimate the distance of the objects from Earth.

Subtle variations in the CMBs glow offer anchor points to form the other two vertices of the triangle. Those variations in temperature and polarization resulted from quantum fluctuations in the early universe that got amplified by the expanding universe into regions of varying density. (The denser patches would go on to form galaxy clusters.) Scientists have a strong enough understanding of the universes early years to know that these variations in the CMB should typically be spaced out every billion light-years for temperature and half that for polarization. (For scale, our Milky Way galaxy is about 200,000 light-years in diameter.)

The Atacama Cosmology Telescope measured the CMB fluctuations with unprecedented resolution and sky coverage, taking a closer look at the polarization of the light. The Planck satellite measured the same light, but by measuring its polarization in higher fidelity, the new picture from Atacama reveals more of the oldest patterns weve ever seen, said Suzanne Staggs, the telescopes principal investigator and the Henry deWolf Smyth Professor of Physics at Princeton University.

This measurement was possible thanks to new technology designed and built by McMahons team.Basically, we figured out how to make the detectors measure two colors and to pack as many into each camera as possible, McMahon said.Then we developed new lenses out of metamaterials. (Metamaterials are a type of material thats engineered to produce properties that dont exist naturally.)

From conception to deployment at the telescope to analysis, the process has spanned nearly 10 years, McMahon said. Working with this amazing team to develop this project all the way from concept sketches to producing results at the forefront of cosmology, has been absolutely fantastic.

Prof. Wendy Freedman explains a new method for measuring the expansion of the universe.

Sara Simon, now at Fermi National Accelerator Laboratory, made significant contributions to detector design; UChicago graduate student Joey Golec developed methods to fabricate the metamaterial optics; and UChicago graduate student Maya Mallaby-Kay is now working to make the datasets public.

As the Atacama Cosmology Telescope continues making observations, astronomers will have an even clearer picture of the CMB and a more exact idea of how long ago the cosmos began. The team will also scour those observations for signs of physics that doesnt fit the standard cosmological model. Such strange physics could resolve the disagreement between the predictions of the age and expansion rate of the universe arising from the measurements of the CMB and the motions of galaxies.

Were continuing to observe half the sky from Chile with our telescope, said Mark Devlin, the telescopes deputy director and the Reese W. Flower Professor of Astronomy and Astrophysics at the University of Pennsylvania. As the precision of both techniques increases, the pressure to resolve the conflict will only grow.

I didnt have a particular preference for any specific value it was going to be interesting one way or another, said Cornell Universitys Steve Choi, first author of the other paper posted to arXiv.org. We find an expansion rate that is right on the estimate by the Planck satellite team. This gives us more confidence in measurements of the universes oldest light.

###

References:

The Atacama Cosmology Telescope: DR4 Maps and Cosmological Parameters by Simone Aiola, et al., 14 July 2020, Astrophysics > Cosmology and Nongalactic Astrophysics.arXiv: 2007.07288

The Atacama Cosmology Telescope: A Measurement of the Cosmic Microwave Background Power Spectra at 98 and 150 GHz by Steve K. Choi, et al., 14 July 2020, Astrophysics > Cosmology and Nongalactic Astrophysics.arXiv: 2007.07289

The ACT team is an international collaboration, with scientists from 41 institutions in seven countries. The telescope is supported by the National Science Foundation and contributions from member institutions.

See the article here:

Fresh Twist to Debate Over Universes Age From New View of the Oldest Light in the Universe - SciTechDaily

Nvidia And University Of Florida Supercharge Education With AI Supercomputer – Forbes

Chris Malachowsky, Nvidia co-founder

Nvidia and The University of Florida (UF) are in engaging in a unique public-private partnership that could result in the development of the largest university AI supercomputer in the United States, and perhaps the world. The project is anchored by a $25 million gift from UF alumnus and Nvidia co-founder, Chris Malachowsky along with a matching $25 million grant from Nvidia in the form of hardware, software, training, and services, as well as an additional $20 million from UF for data center upgrades.

The project was inspired by Malachowsky who was looking for a way to help the university expand its reach and bring artificial intelligence (AI) to the forefront at UF. The initiative includes a commitment from UF to hire 100 additional faculty members focused on AI. They will join 500 new faculty recently added across disciplines many of whom will weave AI into their teaching and research. The University expects to integrate the use of this AI supercomputer throughout various departments. In addition, the University is introducing a Bachelor of Science degree in Data Science this fall.

Malachowsky hopes this unique project will become a template for other universities and companies to follow. He is quoted as saying: Artificial intelligence is the most disruptive technology of our era, with sweeping implications for how we live and work. In my conversation with Malachowsky he expressed great enthusiasm for bringing AI to a broad set of disciplines at the UF - from precision agriculture, to astrophysics, and to marine biology. The obvious applications are in engineering disciplines for applications such as autonomous driving research. In addition, Malachowsky also expects there will be courses in other areas such as the ethics of AI and journalism to understanding the impact of AI on society.

Malachowsky believes that the Nvidia AI supercomputer will enhance research into all these areas with both number crunching and machine learning capability. In particular, he believes that solving some of the toughest problems we face today, such as alternative energy and climate change, requires an interdisciplinary approach that includes massive compute power and machine learning for simulation and modeling.

Overall, there would be an general enhancement to STEM (short for Science, Technology, Engineering, Math) education throughout the University. The system that Nvidia will be delivering to UF later this year which will be up and running just a few weeks later is an Nvidia DGX SuperPOD. A similar, though larger, in-house system at Nvidia called Selene is in the No. 7 spot in the latest Top500 supercomputer list with an HPL mark of 27.58 petaflops. The DGX SuperPOD is powered by Nvidas new Ampere A100 GPUs and AMDs EPYC Rome CPUs and uses Mellanox HDR InfiniBand as the system network. Separately, it was announced earlier this year that UF was the first institution of higher learning in the U.S. to receive DGX A100 systems, which have already been deployed in an existing supercomputer.

NVIDIA SuperPOD Data Center

This public-private initiative could be a model for other industry and academic collaborations. Alumni can work with their alma mater, industry, and local governments to make significant hardware and monetary contributions while the universities would provide the academic environment and the researchers to put that hardware to work. Malachowsky believes that this type of program can help to improve the United States international competitiveness if it were to be replicated. UF is already moving ahead with improving access to its technology and will make the AI supercomputer available to other state and regional schools.

Malachowsky believes this really is a moonshot opportunity for the University and for all educators to leverage this unprecedented access to advanced compute capability and AI to advance the country.

The author and members of the Tirias Research staff do not hold equity positions in any of the companies mentioned. Tirias Research tracks and consults for companies throughout the electronics ecosystem from semiconductors to systems and sensors to the cloud. Members of the Tirias Research team are tracking all the developments in AI technology and have consulted for Nvidia and other companies focused on AI solutions. The author was an Nvidia employee from 2006 to 2010.

Link:

Nvidia And University Of Florida Supercharge Education With AI Supercomputer - Forbes

Here’s why today’s Google Doodle is celebrating the Turkish astrophysicist Dilhan Eryurt – Yorkshire Post

Read This

Monday, 20th July 2020, 11:04 am

Today's Google Doodle celebrates Dilhan Eryurt, a Turkish astrophysicist who played a huge role in the way we understand how the Sun was formed.

But who was she, what were some of her notable achievements, and why has Google chosen today to honour her?

Here's everything you need to know.

Who was Dilhan Eryurt?

Born in 1926 in zmir - Turkey's third most populous city - Prof. Dr. Dilhan Eryurt grew up across the country, first moving to Istanbul with her family, and then on to Turkey's second city, Ankara, a few years later.

After developing an interest in mathematics in high school, Eryurt enrolled in the Istanbul University Department of Mathematics and Astronomy, and upon graduation, was assigned to open an Astronomy Department at Ankara University.

She relocated to the US to continue her graduate studies at the University of Michigan, and while there completed her doctorate at the Ankara University Department of Astrophysics, becoming Associate Professor.

From 1961, Eryurt held a position at NASA's Goddard Space Flight Centre, her appointment extra notable for the fact she was the only female astronomer working at the institution at the time.

What did she study?

Eryurt's work at Goddard revealed some facts about the Sun that were not yet understood.

For instance, she observed that the brightness of the Sun had not increased - it had in fact decreased - since its formation 4.5 billion years ago, revealing that our nearest star was much brighter and warmer in the past.

Her studies influenced the course of the scientific and engineering research aims of space flights - a new and uncharted territory at the time.

In 1969 she was awarded the Apollo Achievement Award for contributions to the Apollo 11 mission. Today (20 July) marks 51 years since Buzz Aldrin, Neil Armstrong and Michael Collins landed and walked on the moon.

Aldrin and Armstrong spent a total of 21 hours and 36 minutes on the moon, but the Apollo 11 mission itself lasted a total of eight days, three hours, 18 min, and 35 seconds.

This is likely the reason Google have chosen today to celebrate Eryurt's life; her research provided NASA engineers with crucial information for modelling solar impact on the lunar environment

She later moved on to work at the California University, where she studied the formation and development of Main Sequence stars - a continuous band of stars that appear on plots of stellar colour versus brightness.

What else did she do?

Throughout her long and successful career, Eryurt became an award-winning astronomer, picking up all sorts of nods for her contributions and work.

Other notable achievements of hers include the organising of Turkey's first National Astronomy Congress in 1968, and the establishment of the Astrophysics Department at the Middle East Technical University.

She retired in 1993 after a long career, and sadly died in September 2012 at the age of 85, suffering a heart attack in Ankara.

See more here:

Here's why today's Google Doodle is celebrating the Turkish astrophysicist Dilhan Eryurt - Yorkshire Post

UChicago scientists reflect on need to address racism, inequality – UChicago News

When physicist Brian Nord joined the Dark Energy Survey in 2012, a state-of-the-art project to map the night sky, he wasas far as he knewthe only Black American man in the multi-institution collaboration of more than 400 scientists. Today, he still is.

When I was a child, I wanted to grow up to share the beauty and gifts of a scientific understanding of the universe with the world, Nord wrote in an open letter to global colleagues. Ive had the privilege to find and create knowledge for my fellow humans. Im one of the lucky ones. How many have shared my dream, but never got this close, because of the science communitys complicity through inaction?

An associate scientist at Fermilab and University of Chicago visiting research assistant professor, Nord is a member of Particles for Justicean international movement of scientists that works to counter social injustice in science. He and astrophysicist Chanda Prescod-Weinstein of the University of New Hampshire co-led a call for a day of action June 10 in which non-Black scientists would plan how to better support their Black colleagues and address the racial injustices in society, academia and in science.

Thousands of scientists around the world participated. Large scientific collaborations like LIGO, the Rubin Observatory Legacy Survey of Space and Time and the Dark Energy Survey cancelled their meetings; the journals Science and Nature,as well as the popular site arxiv.org, paused their publishing. Instead, scientistsincluding many in the physical sciences at UChicagoread, reflected, donated and met on how to move forward.

Our Black colleagues do not feel safe in our work environment. Thats not OK, said astrophysicist and graduate student Adina Feinstein, who is white. For academia as an institutiona space that prides itself on boundless creativity and innovationto be systemically racist is so backwards. But we are using the momentum of the current atmosphere to strongly push for these changes.

Feinstein and Thaddeus Komacek, a postdoctoral researcher in the Geophysical Sciences, lead a discussion in the Exoplanet Journal Club and came up with a list of immediate initiatives for the group. They, along with other scientists in the Inclusivity, Diversity, and Equity in Astronomy group, also pulled together a list of larger, concrete action items that the astronomy community could undertake to improve equity.

Chihway Chang, the Clare Booth Luce Assistant Professor of Astrophysics, also discussed action plans within the Survey Science group she led together with Asst. Prof. Alex Drlica-Wagner. Chang, who grew up in Taiwan, said the past few weeks of protest and discussion in the U.S. have been transformational for her.

In the beginning, I think I didnt really understand the full extent of the problem since I didnt grow up here and have less of the cultural background, she said. But inequality in academiathat is something I understand. As a woman in science, I think back on all the incidents in my academic career where I thought, Should I say something? and I stayed quiet because it felt like it wasnt going to change anything.

This feels different, she said. This feels like change is possible. And now that Im faculty, I especially have the responsibility to make changes, she said. You need to do that to show students its OK to speak up.

Nord agreed.

Sometimes people hear and respond empathetically, but its usually behind closed doors, he said. My colleagues are still realizing the need to publicly hold each other accountable when racist, misogynistic or homophobic things are said. You can still uphold the values of free speech and also hold people accountable for racist statements.

Sam McDermott, a Kavli Institute for Cosmological Physics associate fellow, also helped organize the day of action. He spoke on the need for white scientists like himself to educate each other and hold each other accountable.

No one likes to hear that theyre part of a racist establishment, he said. Its often met with defensiveness or evasiveness. Ive had some good, sincere conversations with people in power in the past few weeks; but itll be a really long time before we know how much they really meant it.

Theres really one metric for success, McDermott added: Do our institutions reflect the makeup of the country as a whole at every leveldirectorships, department chairs, collaboration heads, postdocs and students?

As for a plan, Nord said: Go find where Black people do physics. Hire them and retain them. Pay them competitively and for skills they have, like how to manage white supremacyBlack people have been doing a lot of work for the academy that we dont get paid or recognized for. Thats how you rebuild your institution in a way that is just and equitable.

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UChicago scientists reflect on need to address racism, inequality - UChicago News

Comet NEOWISE: How to See It in Night Skies – The New York Times

Eager sky watchers are turning to the heavens as Comet NEOWISE, one of the brightest comets in a generation, starts climbing ever higher among the evening stars.

A majority of comets fly through the solar system invisible to humans, usually too small and dim to be seen with the naked eye. The last frozen ice ball that gave us a big show was Hale-Bopp, a comet that was visible for nearly 18 months around its closest approach to Earth in 1997.

Officially designated C/2020 F3, Comet NEOWISE was discovered on March 27 and had until this week been visible only to committed comet viewers willing to wake up in the early pre-dawn hours. But on Monday, NEOWISE tipped into the post-sunset sky and has even been spotted by people living near city centers with all the light pollution.

Its the first time in 23 years that this is possible, said Federica Spoto, an astronomer at the Harvard & Smithsonian Center for Astrophysics. You can watch it from your backyard and you dont need a telescope.

To catch NEOWISE yourself, look up at the northwest skies about an hour and a half after sunset. Experts suggest going to the darkest area you can for best viewing. Find the Big Dipper and follow its ladle as it arcs in the direction of the horizon.

NEOWISE will appear under the Big Dipper about 10 degrees above the horizon and be about as bright as that constellations stars. If you hold out your arm, 10 degrees is roughly the part of the sky covered by your fist. Over the next few days, NEOWISE will move higher in the sky and be easier to spot, reaching its apex on July 23, when it makes its closest approach to Earth.

Good binoculars will allow you to see more of the comet and its spectacular dust tail. Lucky viewers might even catch the fainter blue ion tail, made from charged particles flying off the comets icy nucleus. NEOWISE is visible only to observers in the Northern Hemisphere and should remain bright enough to spot into mid-August.

For those looking to capture a souvenir of their experience, a digital camera placed on a tripod and set to a five- or 10-second exposure could do the trick, said Ernesto Guido, an amateur astronomer in Italy. Many cellphones allow users to change the settings on their cameras and achieve surprisingly good results. Try framing NEOWISE against a nice background such as a tree, Mr. Guido suggested.

Comet NEOWISE gets its name from NASAs Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE), a space-based infrared telescope dedicated to looking out for potentially hazardous asteroids and comets. Researchers who manage the observatory spotted the comet in March when it was headed in the direction of the sun.

Comet NEOWISE made its closest approach to our star on July 3, coming within the orbit of Mercury.

A smaller or weaker comet would have crumbled under the pressure, said Amy Mainzer, principal investigator of the NEOWISE mission.

Thats exactly what happened earlier this year to Comet SWAN, which was just barely visible to naked-eye viewers in the Southern Hemisphere, before fizzling as it rounded the sun. Another comet, ATLAS, disintegrated into more than two dozen pieces in April.

NEOWISE comes to us from the distant outer reaches of the solar system, having spent most of its life in a frigid field of icy bodies called the Oort cloud. When far from the sun, comets are inert and lack their beautiful dust tails, which can be 10 million miles long. The suns heat causes them to expel gas and dust, forming an atmospheric shell called a coma and then the pressure of solar radiation extends this structure out into a long tail.

Comets like NEOWISE are leftovers from our solar systems creation. Since they retain the building blocks of planets in their frozen ice, they can provide scientists with important information about our origins. Dr. Mainzer likened its approach to a mission that collects samples and returns them to Earth, except the sample comes to us.

NEOWISE wont make it back to the inner solar system for 6,800 years. So enjoy it while you can.

Things are really tough right now for lots of people, Dr. Mainzer said. But this is a chance to look up and reconnect with the big picture stuff.

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Comet NEOWISE: How to See It in Night Skies - The New York Times

Comet Neowise: How To See It On Long Island – Patchogue, NY Patch

LONG ISLAND Comet Neowise is zooming past the planet, and you'll be able to see it in the skies above Long Island for the next several days. To see the brightest comet in nearly a quarter of a century, all you need is a little patience.

Comet Neowise has been visible in the east-northeast sky with the naked eye about an hour before sunrise for the past month. The comet, which NASA says could become known as the "Great Comet of 2020," is going prime time, though, and this week it is visible in the evening sky.

It will appear in the northwestern sky about an hour after sunset, below the Big Dipper, according to NASA.

Though you'll be able to see it without a small telescope or binoculars, weather permitting, those instruments offer better views.

Sky & Telescope says Comet Neowise will appear just as the last of twilight fades into darkness. The Big Dipper hangs by its handle at this time, so look about three fists below the "bowl."

Comet Neowise will fade after July 19 as it comes closer to our planet. Its closest approach to Earth occurs on July 22, after which it will fade more rapidly and eventually disappear from our solar system.

The comet has brightened 100-fold since June 9 and is only getting better especially for those with an aversion to early mornings.

The comet appears to rise tail first, followed by its bright head or coma, which Space.com said shines "as bright as a first-magnitude star" a designation reserved for some the brightest of stars. For comparison purposes, Polaris, the North Star, is a second-magnitude star. Since magnitude is a logarithmic scale, the comet will appear to be about 2.5 times brighter than Polaris.

Comet Neowise appears low on the horizon, so early morning viewers will need to plan to get away from trees and buildings. It's also competing with a nearly full moon, which can make it hard to see.

Relatively new in the continuum of time, Comet Neowise hasn't made an appearance in our solar system for 6,800 years.

NASA says the comet is an inner-solar system "intruder" that could become known as the Great Comet of 2020. It's large by comet standards, measuring about 3 miles across.

The comet is the brightest to visit Earth since Comet Hale-Bopp made an appearance in 1997.

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Comet Neowise: How To See It On Long Island - Patchogue, NY Patch

Ghostly Particles from the Sun Confirm Nuclear Fusion – Eos

Deep within the Sun, high temperatures and pressures drive the fusion of hydrogen into helium. Absent these nuclear reactions, Earth would be a cold and dark world devoid of life. Now, using an exquisitely sensitive detector located deep underground, researchers have made the first direct observation of a rare breed of ghostly particles known as solar neutrinos. This discovery confirms a long-hypothesized mechanism for how the Sunand other starsfuses hydrogen into helium.

Over 8 decades ago, physicists Hans Bethe and Carl Friedrich von Weizscker independently proposed that hydrogen fusion in the Sun might be catalyzed by carbon (C), nitrogen (N), and oxygen (O) nuclei. Researchers now understand that this so-called CNO cycle accounts for only a small fraction of the energy produced by the Sunroughly 1%but its a dominant mechanism in more massive stars. (Most of the Suns energy derives from a fusion process known as the pp chain.)

Both the pp chain and the CNO cycle produce neutrinos. These electrically neutral, nearly massless particles pervade space, yet theyre maddeningly tough to pin down because they interact so weakly with matter. Neutrinos are very difficult to detect, said Sarbani Basu, a solar and stellar astrophysicist at Yale University in New Haven, Conn., not involved in the research. They pass right through you. (Hold up a hand. Tens of billions of neutrinos just zipped through.)

Neutrinos are a hallmark of the Suns nuclear reactions, and theyre a fundamental way of studying processes that occur deep within our nearest star. But it wasnt until 2014 that researchers reported detecting neutrinos from the primary reaction of the pp chain. Now that same research group has pinpointed neutrinos from the CNO cycle.

The team used the Borexino particle detector located roughly 1,400 meters underground near Rome, Italy. (The detectors subterranean environment shields it mightilybut not completelyfrom a barrage of cosmic particles.) The heart of Borexino is a spherical tank roughly 4 meters in diameter filled with about 280 metric tons of a liquid hydrocarbon. This scintillator liquid emits light whenever a charged particle moves through it. If a neutrino happens to collide with an electron in the tank, the resulting burst of light is captured by photomultiplier tubes within the detector. Neutrinos from the CNO cycle can be distinguished on the basis of the kick they impart to electrons.

One long-standing challenge to detecting CNO cycle neutrinos has been background contamination. For example, the radioactive decay of bismuth-210, found in the nylon lining Borexinos innermost tank, releases charged particles that can trigger bursts of light, said Gioacchino Ranucci, an astroparticle physicist at the National Institute for Nuclear Physics in Milan, Italy, and a spokesman for the Borexino Collaboration. Even if its a small amount, it can mask the signal of the neutrinos.

To combat this contamination, the scientists carefully controlled Borexinos thermal environment. They clad the detector in a thick layer of insulation and installed a heater nearby. Those efforts minimized convective currents within the detectors liquid, important for preventing the dispersal of bismuth-210 and its daughter products. The research team also limited its analyses to signals originating from deep within Borexinos innermost tank, far from the detectors nylon lining.

This discovery is another milestone in solar neutrino physics.Last month, at the XXIX International Conference on Neutrino Physics and Astrophysics, the Borexino Collaboration reported a confident detection of CNO cycle neutrinos based on 3.5 years of data. Borexino spotted about seven of these elusive particles each day, the team estimated.

This discovery is another milestone in solar neutrino physics, the team of nearly 100 reported in an accompanying paper.

These results are exciting, said Yales Basu, but the error bars on the detection are still large. Those will get smaller as more data are collected, so its important to keep the experiment going, she said. Keep observing, keep observing.

Katherine Kornei (@KatherineKornei), Science Writer

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Ghostly Particles from the Sun Confirm Nuclear Fusion - Eos

Trending Today Corona impact on X-Ray Screening System Market 2020-2025, Studied in Detail along with Top Companies as- ADANI, Smiths Detection,…

The global X-Ray Screening System Market is carefully researched in the report while largely concentrating on top players and their business tactics, geographical expansion, market segments, competitive landscape, manufacturing, and pricing and cost structures. Each section of the research study is specially prepared to explore key aspects of the global X-Ray Screening System Market. For instance, the market dynamics section digs deep into the drivers, restraints, trends, and opportunities of the global X-Ray Screening System Market. With qualitative and quantitative analysis, we help you with thorough and comprehensive research on the global X-Ray Screening System Market. We have also focused on SWOT, PESTLE, and Porters Five Forces analyses of the global X-Ray Screening System Market.

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X-Ray Screening System Market competition by top manufacturers/Key player Profiled:ADANI, Smiths Detection, Scanna, Astrophysics Inc., UTI Grup, Bavak Beveiligingsgroep, L3 Security & Detection Systems, Rapiscan Systems, Nuctech

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The global X-Ray Screening System market was valued at $XX million in 2019, and MAResearch analysts predict the global market size will reach $XX million by the end of 2029, growing at a CAGR of XX% between 2019 and 2029.

Since the COVID-19 virus outbreak in December 2019, the disease has spread to over 210 countries and territories around the world and 2 international conveyances. The global impacts of COVID-19 are already starting to be felt, and will significantly affect this industry in 2020.

This report analyses the impact of COVID-19 on this industry. COVID-19 can affect the global market in 3 ways: by directly affecting production and demand, by creating supply chain and market disruption, and by its financial impact on enterprises and financial markets.

This report provides detailed historical analysis of global market for X-Ray Screening System from 2014-2019, and provides extensive market forecasts from 2020-2029 by region/country and subsectors. It covers the sales volume, price, revenue, gross margin, historical growth and future perspectives in the X-Ray Screening System market.

Segmentation by Product:

People X-ray ScreeningBaggage & Cargo X-ray ScreeningVehicle X-ray ScreeningOthers

Segmentation by Application:

Prisons and Correctional FacilitiesCustoms and Border CrossingsMines and Industrial SecurityHotels, Public and Government BuildingsOthers

Competitive Analysis:

Global X-Ray Screening System Market is highly fragmented and the major players have used various strategies such as new product launches, expansions, agreements, joint ventures, partnerships, acquisitions, and others to increase their footprints in this market. The report includes market shares of X-Ray Screening System Market for Global, Europe, North America, Asia-Pacific, South America and Middle East & Africa.

Scope of the Report:The all-encompassing research weighs up on various aspects including but not limited to important industry definition, product applications, and product types. The pro-active approach towards analysis of investment feasibility, significant return on investment, supply chain management, import and export status, consumption volume and end-use offers more value to the overall statistics on the X-Ray Screening System Market. All factors that help business owners identify the next leg for growth are presented through self-explanatory resources such as charts, tables, and graphic images.

The report offers in-depth assessment of the growth and other aspects of the X-Ray Screening System market in important countries (regions), including:

North America(United States, Canada and Mexico)

Europe (Germany, France, UK, Russia and Italy)

Asia-Pacific (China, Japan, Korea, India, Southeast Asia and Australia)

South America (Brazil, Argentina, Colombia)

Middle East and Africa (Saudi Arabia, UAE, Egypt, Nigeria and South Africa)

Our industry professionals are working reluctantly to understand, assemble and timely deliver assessment on impact of COVID-19 disaster on many corporations and their clients to help them in taking excellent business decisions. We acknowledge everyone who is doing their part in this financial and healthcare crisis.

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Table of Contents

Report Overview:It includes major players of the global X-Ray Screening System Market covered in the research study, research scope, and Market segments by type, market segments by application, years considered for the research study, and objectives of the report.

Global Growth Trends:This section focuses on industry trends where market drivers and top market trends are shed light upon. It also provides growth rates of key producers operating in the global X-Ray Screening System Market. Furthermore, it offers production and capacity analysis where marketing pricing trends, capacity, production, and production value of the global X-Ray Screening System Market are discussed.

Market Share by Manufacturers:Here, the report provides details about revenue by manufacturers, production and capacity by manufacturers, price by manufacturers, expansion plans, mergers and acquisitions, and products, market entry dates, distribution, and market areas of key manufacturers.

Market Size by Type:This section concentrates on product type segments where production value market share, price, and production market share by product type are discussed.

Market Size by Application:Besides an overview of the global X-Ray Screening System Market by application, it gives a study on the consumption in the global X-Ray Screening System Market by application.

Production by Region:Here, the production value growth rate, production growth rate, import and export, and key players of each regional market are provided.

Consumption by Region:This section provides information on the consumption in each regional market studied in the report. The consumption is discussed on the basis of country, application, and product type.

Company Profiles:Almost all leading players of the global X-Ray Screening System Market are profiled in this section. The analysts have provided information about their recent developments in the global X-Ray Screening System Market, products, revenue, production, business, and company.

Market Forecast by Production:The production and production value forecasts included in this section are for the global X-Ray Screening System Market as well as for key regional markets.

Market Forecast by Consumption:The consumption and consumption value forecasts included in this section are for the global X-Ray Screening System Market as well as for key regional markets.

Value Chain and Sales Analysis:It deeply analyzes customers, distributors, sales channels, and value chain of the global X-Ray Screening System Market.

Key Findings: This section gives a quick look at important findings of the research study.

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Trending Today Corona impact on X-Ray Screening System Market 2020-2025, Studied in Detail along with Top Companies as- ADANI, Smiths Detection,...

Spectacular sight: 5 planets together appeared in Karachi at midnight – The News International

KARACHI: Five planets of the solar system witnessed together at 12 on Sunday night in the Pakistan sky, a top planetary scientist announced.

The five planets that were viewed simultaneously including Mercury, Venus, Mars, Jupiter, and Saturn, according to Prof Dr Muhammad Jawed Iqbal, the director at the Institute of Space and Planetary Astrophysics (ISPA) a research facility at the University of Karachi.

"Five planets were visible together at midnight and all five could be seen without binoculars," Dr Iqbal said. "Usually, two to three planets are visible in the night sky.

The scientist noted that the coming together of the planets would be available for viewing for the next few nights. However, it would be difficult to see the interesting activity in the sky due to Karachis current cloudy weather.

It is interesting to note that at the same time, Mercury was in retrograde (apparent motion of moving backwards) for the second time this year, from June 18 to July 12, 2020, according to Forbes. Furthermore, the ringed Saturn would be brightest at night on July 20, the publication added, as it would reach opposition.

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Spectacular sight: 5 planets together appeared in Karachi at midnight - The News International