Other
Scientific paper
Aug 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...413..670w&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 413, no. 2, p. 670-679.
Other
9
Binary Stars, Photosphere, Polarized Light, Stellar Envelopes, Algol, Curve Fitting, Radiative Transfer, Stellar Models
Scientific paper
We compute photospheric and circumstellar polarization from a general binary star model, without the usual geometrical approximations. In particular, we do not use the approximation that all polarization is generated in a thin ring at the limb, which makes a substantial difference in eclipse polarization signatures. We synthesize curves which show properly combined photospheric and circumstellar polarization and develop expressions for computing partial derivatives of the observable Stokes quantities with respect to binary star parameters, so that the method of differential corrections can be applied. We fit the model by least squares to observed polarization curves of Algol, which show both circumstellar and photospheric polarization. The circumstellar region which causes the main polarization sinusoid is in approximately the same location as a region of spectral activity found by others.
Liou Jer-Chyi
Wilson Robert E.
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