Abundance Ratios of OH/CO and HCO+/CO as Probes of the Cosmic-Ray Ionization Rate in Diffuse Clouds

The cosmic-ray ionization rate (CRIR, ζ _2 ) is one of the key parameters controlling the formation and destruction of various molecules in molecular clouds. However, the current most commonly used CRIR tracers, such as ${{\rm{H}}}_{3}^{+}$ , OH ^+ , and H _2 O ^+ , are hard to detect and require th...

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Bibliographic Details

Published in:	The Astrophysical Journal
Main Authors:	Gan Luo, Zhi-Yu Zhang, Thomas G. Bisbas, Di Li, Ping Zhou, Ningyu Tang, Junzhi Wang, Pei Zuo, Nannan Yue
Format:	Article
Language:	English
Published:	IOP Publishing 2023-01-01
Subjects:	Interstellar absorption Interstellar medium Interstellar molecules Interstellar abundances Molecular clouds Chemical abundances
Online Access:	https://doi.org/10.3847/1538-4357/acbf34