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
Discovery of the Elusive Thioketenylium, HCCS<sup>+</sup>, in TMC-1
Astron. Astrophys. 654, Art. No. A45 (2021).
Thioketenylium, HCCS+, 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 1H hyperfine splitting (not all fine structure components were covered). The CCS/HCCS+ column density ratio of 50 ± 10 is similar to those of CS/HCS+ (35 ± 8) and CCCS/HCCCS+ (65 ± 20).


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