SIMBAD references

2019A&A...621A.114Z - Astronomy and Astrophysics, volume 621A, 114-114 (2019/1-1)

Deuterated methyl mercaptan (CH3SD): Laboratory rotational spectroscopy and search toward IRAS 16293-2422 B.

ZAKHARENKO O., LEWEN F., ILYUSHIN V.V., DROZDOVSKAYA M.N., JORGENSEN J.K., SCHLEMMER S. and MULLER H.S.P.

Abstract (from CDS):

Methyl mercaptan (also known as methanethiol), CH3SH, has been found in the warm and dense parts of high- as well as low- mass star-forming regions. The aim of the present study is to obtain accurate spectroscopic parameters of the S-deuterated methyl mercaptan CH3SD to facilitate astronomical observations by radio telescope arrays at (sub)millimeter wavelengths. We have measured the rotational spectrum associated with the large-amplitude internal rotation of the methyl group of methyl mercaptan using an isotopically enriched sample in the 150-510GHz frequency range using the Koln millimeter wave spectrometer. The analysis of the spectra has been performed up to the second excited torsional state. We present modeling results of these data with the RAM36 program. CH3SD was searched for, but not detected, in data from the Atacama Large Millimeter/submillimeter Array (ALMA) Protostellar Interferometric Line Survey (PILS) of the deeply embedded protostar IRAS 16293-2422. The derived upper limit corresponds to a degree of deuteration of at most ∼18%.

Abstract Copyright: © ESO 2019

Journal keyword(s): methods: laboratory: molecular - techniques: spectroscopic - ISM: molecules - astrochemistry - ISM: abundances - radio lines: ISM

VizieR on-line data: <Available at CDS (J/A+A/621/A114): input.txt output_CH3SD>

Simbad objects: 7

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2020.01.17-20:26:50

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