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Spectroscopic characterization and detection of Ethyl Mercaptan in Orion

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arxiv 1401.7810 v1 pith:LHDL5AM2 submitted 2014-01-30 astro-ph.GA

Spectroscopic characterization and detection of Ethyl Mercaptan in Orion

L. Kolesnikov\'a , B. Tercero , J. Cernicharo , J. L. Alonso , A. M. Daly , B. P. Gordon , S. T. Shipman This is my paper
classification astro-ph.GA
keywords mercaptanoriondetectionethylmethylspectroscopicabundantallowed
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abstract

New laboratory data of ethyl mercaptan, CH$_{3}$CH$_{2}$SH, in the millimeter and submillimeter-wave domains (up to 880 GHz) provided very precise values of the spectroscopic constants that allowed the detection of $gauche$-CH$_3$CH$_2$SH 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, CH$_{3}$SH, in the spectral survey of Orion KL is reported as well. Our column density results indicate that methyl mercaptan is $\simeq$ 5 times more abundant than ethyl mercaptan in the hot core of Orion KL.

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