Mapping the Cosmic-Ray Ionization Rate in the Local Galaxy with H${}_3^{+}$

Nick Indriolo, Alexei V. Ivlev, T. Pellegrin +6

Chemistry in diffuse molecular clouds relies primarily on rapid ion-molecule reactions. Formation of the initial ions, H${}^{+}$ and H${}_2^{+}$, is dominated by cosmic-ray ionization of H…