Statistics – Computation
Scientific paper
Dec 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...347..468b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 347, Dec. 1, 1989, p. 468-478. Research supported by the Nuffield Foundatio
Statistics
Computation
28
B Stars, Electron Distribution, Polarized Light, Stellar Envelopes, Stellar Occultation, Computational Astrophysics, Density Distribution, Fourier Analysis, Optical Thickness, Radiative Transfer, Thomson Scattering
Scientific paper
The depolarizing and occultation effects of a finite spherical light source on the polarization of light Thomson-scattered from a flat circumstellar envelope seen edge-on are analyzed. The analysis shows that neglect of the finite size of the light source leads to a gross overestimate of the polarization for a given disk geometry. By including occultation and depolarization, it is found that B-star envelopes are necessarily highly flattened disk-type structures. For a disk viewed edge-on, the effect of occultation reduces the polarization more than the inclusion of the depolarization factor alone. Analysis of a one-dimensional plume leads to a powerful technique that permits the electron density distribution to be explicitly obtained from the polarimetric data.
Brown John C.
Fox Geoffrey K.
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