2016/10/03 by P. Gratier, L. Majumdar, M. Ohishi +4 · 1 citation
Physics and Astronomy · #astro-ph.GA
paper · pdf · doi:10.3847/0067-0049/225/2/25
published as The Astrophysical Journal Supplement Series, Volume 225, Issue 2, article id. 25, 10 pp. (2016) · Accepted for publication in ApJS
arxiv created 2016/10/03 · arxiv updated 2016/10/04
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 Agundez & Wakelam. However, in some cases, large opacity and low signal to noise effects allow only upper or lower limits to be derived, respectively.