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Warm neutral halos around molecular clouds. III - Interpretation of H I and CO J = 1-0 dataThe physical characteristics of the transition region separating the molecular and the atomic medium in interstellar clouds are studied using H I 21-cm and CO J = 1-0 data. Strong evidence is found for general heating of the surface layers of molecular clouds and for the existence of large heated neutral atomic halos around the molecular clouds. The heating of the molecular cloud surface is manifested through the general existence of limb brightening in the CO emission, with a characteristic depth of 1.7 pc, dependent on the Galactic latitude. The heated H I halos have a characteristic depth of 4.7 pc and a maximal extent of about 10 pc.
Document ID
19910035790
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Andersson, B.-G.
(JPL, Pasadena; California, University Los Angeles; Goteborg, Universitet, Sweden)
Wannier, Peter G.
(JPL Pasadena, CA, United States)
Morris, Mark
(California, University Los Angeles, United States)
Date Acquired
August 15, 2013
Publication Date
January 10, 1991
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 366
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
91A20413
Funding Number(s)
CONTRACT_GRANT: NSF AST-87-18068
Distribution Limits
Public
Copyright
Other

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