Radiative transport in circumstellar dust shells

Details Radiative transport in circumstellar dust shells Radiative transport in circumstellar dust shells

Mar 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...204..842t&link_type=abstract

Astrophysical Journal, vol. 204, Mar. 15, 1976, pt. 1, p. 842-852.

Astronomy and Astrophysics

Astrophysics

22

Cosmic Dust, Radiative Transfer, Stellar Envelopes, Stellar Models, Angular Distribution, Atmospheric Stratification, Density Distribution, Energy Distribution, Incident Radiation, Opacity, Optical Thickness, Radiation Distribution

Scientific paper

A calculation of a nongray, extended spherical circumstellar dust shell is presented. The study has been limited to an exploration of the following parameters: (a) angular dependence of the incident radiation field, (b) density distribution, (c) opacities, (d) relative extension of the dust shell, and (e) distance of the inner radius of the shell from the stellar surface. Anisotropic scattering has been included in an approximate manner. The results are applied to VY CMa. The properties of the model which give the best fit are: (1) a dust mixture of 70 percent iron and 30 percent silicates, (2) an inner (outer) shell radius of 5.505 x 10 to the 14 (3.0 x 10 to the 16) cm, and (3) a density law of the form n =zero (r/R) to the -1.

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