===== On the Detection of Thioketenylium, HCCS<sup>+</sup>, in the ISM =====

C. Cabezas, M. Agúndez, N. Marcelino, B. Tercero, Y. Endo, R. Fuentetaja, J. R. Pardo, P. de Vicente, and J. Cernicharo\\
reported on the\\
**[[https://doi.org/10.1051/0004-6361/202142815|Discovery of the Elusive Thioketenylium, HCCS<sup>+</sup>, in TMC-1]]**\\
//Astron. Astrophys.// **654**, Art. No. A45 (2021).\\
Thioketenylium, HCCS<sup>+</sup>, was observed in the course of molecular line surveys of TMC-1 carried out at 7 and 3 mm using the Yebes 40 m and IRAM 30 m telescopes, respectively. Rotational transitions with //N// = 2 − 1 to 4 − 3 and 6 − 5 to 8 − 7 were identified between 32.1 and 99.7 GHz with resolved fine and <sup>1</sup>H hyperfine splitting (not all fine structure components were covered). The CCS/HCCS<sup>+</sup> column density ratio of 50 ± 10 is similar to those of CS/HCS<sup>+</sup> (35 ± 8) and CCCS/HCCCS<sup>+</sup> (65 ± 20).\\

----

Contributor(s): H. S. P. Müller; 03, 2022

----