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arXiv · 2209.07832

Deuterated molecules in regions of high-mass star formation

Igor I. Zinchenko·Andrey G. Pazukhin·Elena A. Trofimova·Peter M. Zemlyanukha·Christian Henkel·Magnus Thomasson
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Abstract

We present the results of our studies of deuterated molecules (DCN, DNC, DCO$^+$, N$_2$D$^+$ and NH$_2$D) in regions of high-mass star formation, which include a survey of such regions with the 20-m Onsala radio telescope and mapping of several objects in various lines with the 30-m IRAM and 100-m MPIfR radio telescopes. The deuteration degree reaches $\sim$10$^{-2}$ in these objects. We discuss its dependencies on the gas temperature and velocity dispersion, as well as spatial distributions of deuterated molecules. We show that the H$^{13}$CN/HN$^{13}$C intensity ratio may be a good indicator of the gas kinetic temperature and estimate densities of the investigated objects.

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Igor I. Zinchenko, Andrey G. Pazukhin, Elena A. Trofimova, Peter M. Zemlyanukha, Christian Henkel, Magnus Thomasson. 2022-09-16. Deuterated molecules in regions of high-mass star formation. https://arxiv.org/abs/2209.07832

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