Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...317..197l&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 317, June 1, 1987, p. 197-206. Research supported by the University of Toro
Astronomy and Astrophysics
Astronomy
15
Cosmic Dust, Interstellar Matter, Interstellar Radiation, Molecular Clouds, Star Formation, Thermal Emission, Infrared Astronomy, Method Of Moments, Radiative Transfer
Scientific paper
Models of the thermal emission from dust within Bok globules are developed, assuming the heat source is the interstellar radiation field (IRF) and accurately solving the radiative-transfer problem using the half-range moment method in spherical geometry. The models are characterized by the central optical depth, the dust density distribution, and the grain type. The FIR flux spectrum and surface-brightness profile are calculated. The primary interest is in the thermalization efficiency of globules. Only globules containing amorphous dust grains are able to convert the incident IRF into FIR emission with the high efficiency implied by the observations. However, this is incompatible with the observed FIR emission with the high efficiency implied by the observations. However, this is incompatible with the observed spectra, which indicate the presence of crystalline silicate grains. Perhaps these conclusions could be reconciled by the addition of an internal radiant heat source, such as a protostar. This would also explain why many globules appear to emit more photons than they can possibly absorb from the IRF.
Hoi Lee Man
Rogers Christopher
No associations
LandOfFree
Thermal emission from BOK globules does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Thermal emission from BOK globules, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermal emission from BOK globules will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1813912