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Título: | TMC-1, the starless core sulfur factory: Discovery of NCS, HCCS, HCCS, HCCCS, and CS and detection of CS |
Autor: | Cernicharo, José CSIC ORCID ; Cabezas, Carlos CSIC ORCID; Agúndez, Marcelino CSIC ORCID; Tercero, Belén CSIC ORCID; Pardo Carrión, Juan Ramón CSIC ORCID ; Marcelino, Nuria CSIC ORCID; Gallego, J. D.; Tercero, F.; López-Pérez, J. A.; Vicente, P. de | Fecha de publicación: | 7-abr-2021 | Editor: | Springer Nature | Citación: | Astronomy and Astrophysics 648: L3 (2021) | Resumen: | We report the detection of the sulfur-bearing species NCS, HCCS, HCCS, HCCCS, and CS for the first time in space. These molecules were found towards TMC-1 through the observation of several lines for each species. We also report the detection of CS for the first time in a cold cloud through the observation of five lines in the 31-50 GHz range. The derived column densities are N(NCS) = (7.8 ± 0.6) × 10 cm, N(HCCS) = (6.8 ± 0.6) × 10 cm, N(HCCS) = (7.8 ± 0.8) × 10 cm, N(HCCCS) = (3.7 ± 0.4) × 10 cm, N(CS) = (3.8 ± 0.4) × 10 cm, and N(CS) = (5.0 ± 1.0) × 10 cm. The observed abundance ratio between CS and CS is 340, that is to say a factor of approximately one hundred larger than the corresponding value for CCS and CS. The observational results are compared with a state-of-the-art chemical model, which is only partially successful in reproducing the observed abundances. These detections underline the need to improve chemical networks dealing with S-bearing species. | Descripción: | 12 pags., 9 figs., 4 tabs. | Versión del editor: | http://dx.doi.org/10.1051/0004-6361/202140642 | URI: | http://hdl.handle.net/10261/258712 | DOI: | 10.1051/0004-6361/202140642 | Identificadores: | doi: 10.1051/0004-6361/202140642 issn: 1432-0746 |
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