molecules:ism:ch3chs [CDMS classic documentation]

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===== On the Detection of Thioacetaldehyde in the ISM =====

 M. Agúndez, G. Molpeceres, C. Cabezas, N. Marcelino, B. Tercero, R. Fuentetaja, P. de Vicente, and J. Cernicharo\\
announced the\\
**[[https://doi.org/10.1051/0004-6361/202453459|Detection of Thioacetaldehyde (CH<sub>3</sub>CHS) in TMC-1: Sulfur-oxygen Differentiation along the Hydrogenation Sequence]]**\\
//Astron. Astrophys.// **693**, Art. No. L20 (2025).\\
Thioacetaldehyde, also known as ethanthial, was identified through four //a//-type transitions with //J// = 3 − 2 and 4 − 3 and //K<sub>a</sub>// ≤ 1 in the course of a molecular line survey of the prototypical cold dark molecular cloud TMC-1 carried out with the Yebes 40 m radio telescope between 31.0 and 50.4 GHz. The transitions displayed resolved methyl internal rotation splitting; the E component of 3<sub>03</sub> − 2<sub>02</sub> is blended. A value of //T//<sub>rot</sub> = 9 K was assumed. Its column density is about a factor of 36 lower than that of acetaldehyde.\\
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Contributor(s): H. S. P. Müller; 01, 2025

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