A NEW REFERENCE CHEMICAL COMPOSITION FOR TMC-1

Abstract : Recent detections of complex organic molecules in dark clouds have rekindled interest in the astrochemical modeling of these environments. Because of its relative closeness and rich molecular complexity, TMC-1 has been extensively observed to study the chemical processes taking place in dark clouds. We use local thermodynamical equilibrium radiative transfer modeling coupled with a Bayesian statistical method which takes into account outliers to analyze the data from the Nobeyama spectral survey of TMC-1 between 8 and 50 GHz. We compute the abundance relative to molecular hydrogen of 57 molecules, including 19 isotopologues in TMC-1 along with their associated uncertainty. The new results are in general agreement with previous abundance determination from Ohishi & Kaifu and the values reported in the review from Agúndez & Wakelam. However, in some cases, large opacity and low signal to noise effects allow only upper or lower limits to be derived, respectively.
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Astrophysical Journal Supplement, American Astronomical Society, 2016, 225 (2), pp.id. 25. 〈10.3847/0067-0049/225/2/25〉
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https://hal.archives-ouvertes.fr/hal-01357756
Contributeur : Marie-Paule Pomies <>
Soumis le : mardi 30 août 2016 - 13:51:47
Dernière modification le : mercredi 28 septembre 2016 - 16:19:10

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P. Gratier, Liton Majumdar, M. Ohishi, E. Roueff, J. C. Loison, et al.. A NEW REFERENCE CHEMICAL COMPOSITION FOR TMC-1. Astrophysical Journal Supplement, American Astronomical Society, 2016, 225 (2), pp.id. 25. 〈10.3847/0067-0049/225/2/25〉. 〈hal-01357756〉

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