H$^{13}$CN-HN$^{13}$C intensity ratio as a temperature indicator of interstellar clouds

Autor: Pazukhin, A. G., Zinchenko, I. I., Trofimova, E. A., Henkel, C.
Rok vydání: 2022
Předmět:
Zdroj: Astron. Rep. 66 (2022) 1302-1310
Druh dokumentu: Working Paper
DOI: 10.1134/S1063772922110154
Popis: With the 30-m IRAM radio telescope, we observed several massive star forming regions at wavelengths of 3-4 and 2 mm. The temperature of the gas in the sources was estimated from the lines of CH$_{3}$CCH and from the transitions of the NH$_3$ molecule obtained during observations at the 100-m radio telescope in Effelsberg. As a result, a correlation between the integrated intensity ratios of the $J=1-0$ transitions of H$^{13}$CN and HN$^{13}$C and the kinetic temperature has been obtained. The obtained results allow us to propose the use of the intensity ratio H$^{13}$CN-HN$^{13}$C as a possible temperature indicator of interstellar clouds. We also compared the obtained estimates of the kinetic temperature with the dust temperature $T_{dust}$. As a result, no significant correlation was found.
Comment: 16 pages, 7 figures, 2 tables, Accepted for publication in Astronomy Reports (2022)
Databáze: arXiv
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