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Infrared limb brightening in the Barnard 5 cloudIRAS and (C-13)O data are presented for the dark cloud Barnard 5. The 100-micron and (C-13)O emission are well correlated and suggest that the 100-micron emission traces the dust and gas column density through the cloud. The 12-micron emission, on the other hand, is anticorrelated with the overall opacity in the cloud, which is interpreted as limb brightening in the context of a model in which small dust grains, probably PAHs, are transiently excited by the absorption of UV photons in a thin shell around the denser parts of the cloud.
Document ID
19880066145
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1086/185271
Authors
Beichman, C. A. (California Institute of Technology Jet Propulsion Laboratory, Pasadena, United States)
Wilson, R. W. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Langer, W. D. (AT&T Bell Laboratories Holmdel, NJ, United States)
Goldsmith, P. F. (Five College Radio Astronomy Observatory Amherst, MA, United States)
Date Acquired
August 13, 2013
Publication Date
September 15, 1988
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 332
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
88A53372
Funding Number(s)
CONTRACT_GRANT: NSF AST-85-12903
Distribution Limits
Public
Copyright
Other

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