The CH radical in diffuse interstellar clouds

Observations of the interstellar CH A-X R2(1) line at 4300.3 A are presented for 29 lines of sight extending from 140 to 2800 pc in the Galactic plane. A comparison of the CH and H2 column density shows that N(CH) varies as N(H2) as expected for production of CH by a gas phase reaction network runni...

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Bibliographic Details
Published in:Astronomy and astrophysics (Berlin) 1984, Vol.130 (1), p.62-66
Main Authors: DANKS, A. C, FEDERMAN, S. R, LAMBERT, D. L
Format: Article
Language:English
Subjects:
Astronomy
Earth, ocean, space
Exact sciences and technology
Interstellar medium (ism) and nebulae in milky way
Molecular clouds, h2 clouds, dense clouds, and dark clouds
Stellar systems. Galactic and extragalactic objects and systems. The universe
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Summary:Observations of the interstellar CH A-X R2(1) line at 4300.3 A are presented for 29 lines of sight extending from 140 to 2800 pc in the Galactic plane. A comparison of the CH and H2 column density shows that N(CH) varies as N(H2) as expected for production of CH by a gas phase reaction network running in molecular hydrogen. The network also reproduces the observed ratio N(CH)/N(H2) for these diffuse interstellar clouds.
ISSN:0004-6361
1432-0746