Dust heating by the interstellar radiation field in models of turbulent molecular clouds

Details Dust heating by the interstellar radiation field in models of turbulent molecular clouds Dust heating by the interstellar radiation field in models of turbulent molecular clouds

2004-04-02

arxiv.org/abs/astro-ph/0404056v1

Astrophys.J. 610 (2004) 801-812

Astronomy and Astrophysics

Astrophysics

32 pages, 14 figures, submitted to ApJ

Scientific paper

10.1086/421902

We have calculated the radiation field, dust grain temperatures, and far infrared emissivity of numerical models of turbulent molecular clouds. When compared to a uniform cloud of the same mean optical depth, most of the volume inside the turbulent cloud is brighter, but most of the mass is darker. There is little mean attenuation from center to edge, and clumping causes the radiation field to be somewhat bluer. There is also a large dispersion, typically by a few orders of magnitude, of all quantities relative to their means. However, despite the scatter, the 850 micron emission maps are well correlated with surface density. The fraction of mass as a function of intensity can be reproduced by a simple hierarchical model of density structure.

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