THE ROTATIONAL SPECTRUM OF THE METHANETHIOL ISOTOPOLOG CH334SH

Müller, Holger S. P.

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https://hdl.handle.net/2142/100564 Copy

Description

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

Issue Date

06/20/18

Keyword(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)."

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/100564

DOI

10.15278/isms.2018.WI08

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