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2007MNRAS.375..278W - Mon. Not. R. Astron. Soc., 375, 278-300 (2007/February-2)
Comparison of 13CO line and far-infrared continuum emission as a diagnostic of dust and molecular gas physical conditions - I. Motivation and modelling.
WALL W.F.
Abstract (from CDS):
The best-fitting models to the Orion clouds consist of two components: a component near the surface of the clouds that is heated primarily by a very large scale (i.e. ∼1kpc) interstellar radiation field and a component deeper within the clouds. The former has a fixed temperature and the latter has a range of temperatures that vary from one sightline to another. The models require a dust-gas temperature difference of 0±2K and suggest that 40-50 per cent of the Orion clouds are in the form of dust and gas with temperatures between 3 and 10K. The implications are discussed in detail in later papers and include stronger dust-gas thermal coupling and higher Galactic-scale molecular gas temperatures than are usually accepted, and an improved explanation for the N(H2)/I(CO) conversion factor. It is emphasized that these results are preliminary and require confirmation by independent observations and methods.
Abstract Copyright: 2006 The Author. Journal compilation © 2006 RAS
Journal keyword(s): dust - ISM: molecules
Simbad objects: 9
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