New laboratory data of ethyl mercaptan, CH3CH2SH, in the millimeter and submillimeter-wave domains (up to 880 GHz) provided very precise values of the spectroscopic constants that allowed the detection of gauche-CH3CH2SH towards Orion KL. 77 unblended or slightly blended lines plus no missing transitions in the range 80-280 GHz support this identification. A detection of methyl mercaptan, CH3SH, in the spectral survey of Orion KL is reported as well. Our column density results indicate that methyl mercaptan is ≃ 5 times more abundant than ethyl mercaptan in the hot core of Orion KL.
@article{arxiv.1401.7810,
title = {Spectroscopic characterization and detection of Ethyl Mercaptan in Orion},
author = {L. Kolesniková and B. Tercero and J. Cernicharo and J. L. Alonso and A. M. Daly and B. P. Gordon and S. T. Shipman},
journal= {arXiv preprint arXiv:1401.7810},
year = {2015}
}
Comments
Accepted for publication in ApJL (30 January 2014)/ submitted (8 January 2014)