Cosmic ray dissociation of molecular hydrogen and dense cloud chemistry

Cosmic ray dissociation of molecular hydrogen and dense cloud chemistry

Dissociation of molecular hydrogen by secondary electrons produced by cosmic ray or X-ray ionization plays a crucial role in the chemistry of the densest part of molecular clouds. Here we study the effect of the mean kinetic energy of secondary electrons on this process. We compare predictions using...

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Veröffentlicht in:arXiv.org 2020-10
Hauptverfasser: Shaw, Gargi, Ferland, G J, Ploeckinger, S
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Cosmic rays
Electrons
Kinetic energy
Molecular clouds
Physics - Astrophysics of Galaxies
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description Dissociation of molecular hydrogen by secondary electrons produced by cosmic ray or X-ray ionization plays a crucial role in the chemistry of the densest part of molecular clouds. Here we study the effect of the mean kinetic energy of secondary electrons on this process. We compare predictions using a range of secondary electron energies and predictions of the cross-sections with the values in the UMIST database. We find that the predicted column densities change by nearly one dex.
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subjects Cosmic rays
Electrons
Kinetic energy
Molecular clouds
Physics - Astrophysics of Galaxies
title Cosmic ray dissociation of molecular hydrogen and dense cloud chemistry
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