Infrared limb brightening in the Barnard 5 cloud

Journal Article · Thu Sep 01 04:00:00 EDT 1988 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/185271· OSTI ID:6575548

Beichman, C A; Wilson, R W; Langer, W D; Goldsmith, P F

IRAS 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. 19 references.

• Research Organization: California Institute of Technology, Pasadena (USA); ATandT Bell Laboratories, Holmdel, NJ (USA); Five College Radio Astronomy Observatory, Amherst, MA (USA)
• OSTI ID: 6575548
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 332; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COSMIC DUST
COSMIC GASES
DUSTS
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
FLUIDS
GASES
INFRARED RADIATION
INFRARED SPECTRA
INTERSTELLAR SPACE
NEBULAE
NONLUMINOUS MATTER
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
SPACE
SPECTRA
ULTRAVIOLET SPECTRA