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arXiv · 2211.14063

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

A. G. Pazukhin·I. I. Zinchenko·E. A. Trofimova·C. Henkel
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Abstract

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.

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A. G. Pazukhin, I. I. Zinchenko, E. A. Trofimova, C. Henkel. 2022-11-25. H$^{13}$CN-HN$^{13}$C intensity ratio as a temperature indicator of interstellar clouds. https://doi.org/10.1134/s1063772922110154

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