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| molecules:ism:hccs-plus [2022/03/08 15:56] – mueller | molecules:ism:hccs-plus [2022/03/08 15:56] – mueller |
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| **[[https://doi.org/10.1051/0004-6361/202142815|Discovery of the Elusive Thioketenylium, HCCS<sup>+</sup>, in TMC-1]]**\\ | **[[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).\\ | //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 column 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).\\ | 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).\\ |
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