Mathematics – Metric Geometry
Scientific paper
Jun 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...246..935r&link_type=abstract
Astrophysical Journal, Part 1, vol. 246, June 15, 1981, p. 935-946. Research supported by the Research Corp.
Mathematics
Metric Geometry
15
Cosmic Dust, Photosphere, Radiative Transfer, Stellar Envelopes, Stellar Spectra, Supergiant Stars, Variable Stars, Absorption Spectra, Density Distribution, High Resolution, Line Spectra, Monte Carlo Method, Optical Thickness, Spatial Resolution, Stellar Atmospheres, Stellar Motions
Scientific paper
The Monte Carlo method is used to simulate the transfer of radiation through an expanding dust shell. The basic assumptions of the investigation include a spherically symmetric geometry, dust grains characterized by a single scattering albedo, and a scattering phase function of the Henyey-Greenstein form. The numerical results are discussed, taking into account models of constant velocity and uniform density, and models assuming a velocity law and mass continuity. Attention is given to dust scattering as origin of velocity shift, the effects of asymmetry parameter and albedo, the effects of a different velocity law, and observational implications and long-period variables.
Leung Man Chun
Romanik Carl J.
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