The chemistry of interstellar HnO+: Beyond the galaxy

The astrochemistry of the HnO+ (n=1..3) ions is important as the main gas-phase formation route for water, and as tracer of the interstellar ionization rate by cosmic rays and other processes. While interstellar H3O+ has been known since the early 1990's, interstellar OH+ and H2O+ have only rec...

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Bibliographic Details
Main Author: van der Tak Floris
Format: Conference Proceeding
Language:English
Subjects:
Astrochemistry
Cosmic rays
Galaxies
Interstellar chemistry
Interstellar gas
Ionization
Organic chemistry
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Summary:The astrochemistry of the HnO+ (n=1..3) ions is important as the main gas-phase formation route for water, and as tracer of the interstellar ionization rate by cosmic rays and other processes. While interstellar H3O+ has been known since the early 1990's, interstellar OH+ and H2O+ have only recently been detected using the Herschel space observatory and also from the ground. This paper reviews detections of HnO+ toward external galaxies and compares with ground-based work. The similarities and differences of the HnO+ chemistry within the Galaxy and beyond are discussed.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4906688