===== On the Detection of Sulfeno, HSO, in the ISM =====

N. Marcelino, C. Puzzarini, M. Agúndez, R. Fuentetaja, B. Tercero, P. de Vicente, and J. Cernicharo\\
described the\\
**[[https://doi.org/10.1051/0004-6361/202346935|First Detection of the HSO Radical in Space]]**\\
//Astron. Astrophys.// **674**, Art. No. L13 (2023).\\
Several hyperfine components of the 1<sub>01</sub> − 0<sub>00</sub> transition near 39.5 and 39.9 GHz were detected with the Yebes 40 m dish toward the cold dense cores B1-b, TMC-1 CP, and L183 in the course of molecular line surveys. The strongest component near 39.532 GHz was also identified toward L483, L1495B, L1527, and Lupus-1A. The abundance ratio of SO to HSO shows some scatter, the former being often around a factor of 100 more abundant. There is indication that the ratio in L1527 is more like 6.\\
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Contributor(s): H. S. P. Müller; 06, 2023

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