Constraining the ortho-to-para ratio of H{_2} with anomalous H{_2}CO absorption

Authors: N. Troscompt, A. Faure, S. Maret, C. Ceccarelli, P. Hily-Blant and L. Wiesenfeld
A&A 506, 1243 (2009) Received 26 June 2009 / Accepted 5 August 2009
Keywords: astrochemistry, ISM: molecules, ISM: abundances, ISM: individual objects: Barnard 68

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