Detection of monothioformic acid towards the solar-type protostar IRAS 16293-2422
| Autor: | Manna, Arijit, Pal, Sabyasachi |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Journal of Astrophysics and Astronomy, 44, 69 (2023) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1007/s12036-023-09961-9 |
| Popis: | In the interstellar medium (ISM), the complex organic molecules that contain the thiol group ($-$SH) play an important role in the polymerization of amino acids. We look for SH-bearing molecules in the chemically rich solar-type protostar IRAS 16293-2422. After the extensive spectral analysis using the local thermodynamic equilibrium (LTE) model, we have detected the rotational emission lines of trans-isomer monothioformic acid (t-HC(O)SH) towards the IRAS 16293 B using the Atacama Large Millimeter/Submillimeter Array (ALMA). We did not observe any evidence of cis-isomer monothioformic acid (c-HC(O)SH) towards the IRAS 16293 B. The column density of t-HC(O)SH towards the IRAS 16293 B was (1.02$\pm$0.6)$\times$10$^{15}$ cm$^{-2}$ with an excitation temperature of 125$\pm$15 K. The fractional abundance of t-HC(O)SH with respect to H$_{2}$ towards the IRAS 16293 B is 8.50$\times$10$^{-11}$. The column density ratio of t-HC(O)SH/CH$_{3}$SH towards the IRAS 16293 B is 0.185. We compare our estimated abundance of t-HC(O)SH towards the IRAS 16293 B with the abundance of t-HC(O)SH towards the galactic center quiescent cloud G+0.693-0.027 and hot molecular core G31.41+0.31. After the comparison, we found that the abundance of t-HC(O)SH towards the IRAS 16293 B is several times of magnitude lower than G+0.693-0.027 and G31.41+0.31. We also discuss the possible formation mechanism of t-HC(O)SH in the ISM. Comment: Accepted for publication in Journal of Astrophysics and Astronomy |
| Databáze: | arXiv |
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