Polarization of intrinsic radiation of tidally distorted stars with electron-scattering atmospheres. I - The case of conservative scattering

Details Polarization of intrinsic radiation of tidally distorted stars with electron-scattering atmospheres. I - The case of conservative scattering Polarization of intrinsic radiation of tidally distorted stars with electron-scattering atmospheres. I - The case of conservative scattering

Jan 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ap%26ss.108....1b&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 108, no. 1, Jan. 1985, p. 1-14.

Statistics

Computation

7

Binary Stars, Electron Scattering, Linear Polarization, Rayleigh Scattering, Stellar Atmospheres, Atmospheric Scattering, Computational Astrophysics, Harmonic Analysis, Roche Limit, Stellar Models

Scientific paper

The variable linear polarization of the intrinsic radiation emitted by tidally distorted stars was computed with the approximation of pure electron or Rayleigh scattering in the atmosphere. A precise form of the equipotential surfaces within the binary-system Roche model, which approximates the form of the star surface, was taken into account. Calculations were made using the Sobolev (1949) and Chandrasekhar (1950) solutions of transport equations for an optically thick medium without true absorption. The behavior of the Stokes polarization parameters Q/I and U/I and the dependence of these on the parameters of the model were subjected to detailed investigation. A harmonic analysis of the curves is presented on the (Q x U) plane. The possibility of establishing the inclination angle of the system and the degree of filling of the Roche-lobe from these curves is discussed. The conclusion is drawn that the amplitude of polarization variations is small, not generally exceeding 0.4 percent; however, in a number of cases it remains at the observable level.

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