Infrared limb brightening in the Barnard 5 cloud

Details Infrared limb brightening in the Barnard 5 cloud Infrared limb brightening in the Barnard 5 cloud

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...332l..81b&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 332, Sept. 15, 1988, p. L81-L85.

Astronomy and Astrophysics

Astronomy

30

Cosmic Dust, Infrared Spectra, Interstellar Matter, Limb Brightening, Nebulae, Abundance, Carbon Monoxide, Dark Matter, Emission Spectra, Infrared Astronomy Satellite, Ultraviolet Spectra

Scientific paper

The authors present IRAS and 13CO data for the dark cloud Barnard 5. The 100 μm and 13CO emission are well correlated and suggest that the 100 μm emission traces the dust and gas column density through the cloud. The 12 μm emission, on the other hand, is anticorrelated with the overall opacity in the cloud which the authors interpret as limb brightening in the context of a model wherein 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.

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