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Radiative transfer in dusty nebulaeThe effects of dust scattering on observable optical and infrared parameters, and the accuracy of approximate solutions were examined. The equation of radiative transfer in a static and homogeneous, but not necessarily uniform, distribution gas and dust around a central empty core with a point source of energy at its center was solved. The dust properties were characterized by a phenomenological extinction cross section, albedo and parameters describing the anisotropy of dust scattering. For ultraviolet photons, ionization equilibrium equations for the gas were solved, and for infrared photons a self-consistent dust temperature was calculated. Ray tracing was used to solve for the angular dependence of the intensity.
Document ID
19780009020
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Dana, R. A. (Stanford Univ. CA, United States)
Date Acquired
September 3, 2013
Publication Date
November 1, 1977
Subject Category
Astrophysics
Report/Patent Number
NASA-CR-155580
SU-SUIPR-722
Accession Number
78N16963
Funding Number(s)
CONTRACT_GRANT: NCA2-OR745-715
CONTRACT_GRANT: NGR-05-020-510
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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