http://arxiv.org/abs/2209.07832
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.
I. Zinchenko, A. Pazukhin, E. Trofimova, et. al.
Mon, 19 Sep 22
12/50
Comments: 8 pages, 4 figures, to be published in Proceedings of Science (Proceedings of the conference “The Multifaceted Universe: Theory and Observations – 2022”, 23-27 May 2022, SAO RAS, Nizhny Arkhyz, Russia)