Mode constraints on nonradial pulsations from polarization data

Details Mode constraints on nonradial pulsations from polarization data Mode constraints on nonradial pulsations from polarization data

May 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..92..293w&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 92, no. 2, May 1983, p. 293-306.

Astronomy and Astrophysics

Astrophysics

4

Hot Stars, Polarized Electromagnetic Radiation, Stellar Oscillations, Variable Stars, Modes, Stellar Atmospheres, Stellar Rotation, Stokes Law Of Radiation

Scientific paper

The distortion of the surface of a hot variable star undergoing nonradial pulsation produces a variable polarization. Resultant changes in the Stokes parameters are here calculated analytically in the linear regime as a function of both the pulsation mode (l, m) and the orientation of the stellar rotation axis. It is shown that all of the necessary stellar atmosphere information may be condensed into one simple integral. The analytic form permits a systematic appraisal of the mode-discriminating ability of polarization observations. A suitable systematic approach is outlined and illustrated with reference to the data for BW Vul.

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