Radiation transport in dust in disk geometry. I - Application to externally heated interstellar clouds

Details Radiation transport in dust in disk geometry. I - Application to externally heated interstellar clouds Radiation transport in dust in disk geometry. I - Application to externally heated interstellar clouds

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...379..232s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 379, Sept. 20, 1991, p. 232-244. Research supported by JPL and Thomas F. an

Computer Science

Numerical Analysis

22

Cosmic Dust, Infrared Spectra, Interstellar Matter, Interstellar Radiation, Nebulae, Radiative Transfer, Anisotropy, Energy Spectra, Mathematical Models, Numerical Analysis, Opacity, Radiant Flux Density, Temperature Distribution

Scientific paper

The dust temperature distribution and the infrared energy spectrum of disk-shaped interstellar dust clouds which are heated externally by the ambient interstellar radiation field are determined by solving numerically the radiation transport problem for both 1D and 2D disk geometries. The effects of source geometry and cloud opacity on the dust temperature distribution, radiation field anisotropy, and infrared energy spectrum are investigated. It is found that equilibrium grain temperature is not extremely sensitive to the cloud geometry or degree of disk flattening. Compared to a spherical model of the same opacity, a similar disk model shows a nearly identical temperature distribution and emergent flux spectrum. The internal radiation in the far-infrared is found to be more anisotropic in disk models and to be predominantly radially streaming.

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