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Title:THE ROTATIONAL SPECTRUM OF THE METHANETHIOL ISOTOPOLOG CH334SH
Author(s):Müller, Holger S. P.
Contributor(s):Menten, Karl M.; Belloche, Arnaud; Garrod, Robin T.; Lees, Ronald M.; Xu, Li-Hong; Krapivin, Igor; Alekseev, E. A.; Ilyushin, V.; Schlemmer, Stephan; Lewen, Frank; Zakharenko, Olena
Subject(s):Mini-symposium: Far-Infrared Spectroscopy
Abstract:Methanethiol, CH$_3$SH, has been found in the warm and dense parts of high as well as low mass star-forming regions.\footnote{See, e.g., H. S. P. M{\"u}ller at al., Astron. Astrophys. 587 (2016) A92; M. N. Drozdovskaya et al., Mon. Not. R. Astron. Soc., accepted, arXiv: 1802.02977; and references therein.} The molecule is also of fundamental interest because of the large amplitude internal rotation of the CH$_3$ group whose effects are somewhat less pronounced than in its lighter homolog CH$_3$OH. In the course of our ongoing study of CH$_3^{32}$SH,\footnote{V. Ilyushin et al., TI04 at the 72nd ISMS, 2017} we have recorded new spectra which currently cover 49$-$510~GHz.\footnote{The work in Kharkov was done under support of the Volkswagen foundation. The assistance of the Science and Technology Center in the Ukraine is acknowledged (STCU partner project \#P686). The work in Cologne was supported by the Deutsche Forschungsgemeinschaft (DFG) via grant SFB~956, project B3 and via the Ger{\"a}tezentrum ''Cologne Center for Terahertz Spectroscopy''.} These spectra, as well as existing ones covering part of the 1.1$-$1.5~THz region,\footnote{L.-H. Xu at al., J. Chem. Phys. 137 (2012) 104313.} were inspected for lines of CH$_3^{34}$SH. We made extensive assignments of $\Delta K = 0$ transitions in $v_t = 0$ to 2. Numerous assignments of $\Delta K = \pm1$ transitions were made in $v_t = 0$ and to a lesser extent in the two higher torsional states. We will present results of modeling these data with the RAM36 program and of searches for this isotopolog in our 3~mm ALMA data of Sagittarius~B2(N).
Issue Date:06/20/18
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:Conference Paper / Presentation
Type:Text
Language:English
URI:http://hdl.handle.net/2142/100564
DOI:10.15278/isms.2018.WI08
Other Identifier(s):WI08
Date Available in IDEALS:2018-08-17
2018-12-12


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