Light variations of X-ray binaries

Physics

Scientific paper

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Binary Stars, Light Scattering, Roche Limit, X Ray Binaries, Celestial Mechanics, Variable Stars, X Ray Scattering

Scientific paper

The interpretation of the light variations of the optical primary of an X-ray binary system is presented in terms of a tidal lobe model. This model is a modified version of a Roche lobe model. The effects of asynchronous rotation, radiation pressure, and weak X-ray heating are included. For each star the observations are tabulated as reduced to a uniform system. The presence of unmodeled light variations in each system are discussed. These, rather than the accuracy of the approximate model, limit the accuracy of the derived parameters. The mass ratios found using the tidal lobe model are expected to be ten percent too large. A new mode of light variation in Sk 160 is revealed by observations presented.

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