Polarization from Thomson scattering of the light of a spherical, limb-darkened star

Details Polarization from Thomson scattering of the light of a spherical, limb-darkened star Polarization from Thomson scattering of the light of a spherical, limb-darkened star

Dec 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978pasp...90..688r&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 90, Dec. 1978-Jan. 1979, p. 688-691.

Astronomy and Astrophysics

Astronomy

11

Light Scattering, Limb Darkening, Stellar Models, Thomson Scattering, Optical Thickness, Radiative Transfer, Stellar Envelopes

Scientific paper

The polarized flux produced by the Thomson scattering of the light of a spherical, limb-darkened star by optically thin, extrastellar regions of electrons is calculated and contrasted to previous models which treated the star as a point source. The point-source approximation is found to be valid for scattering by particles more than a stellar radius from the surface of the star but is inappropriate for those lying closer. The specific effect of limb darkening on the fractional polarization of the total light of a system is explored. If the principal source of light is the unpolarized flux of the star, the polarization is nearly independent of limb darkening.

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