An explanation of light-curve asymmetries in contact binaries by means of the Coriolis effect

Details An explanation of light-curve asymmetries in contact binaries by means of the Coriolis effect An explanation of light-curve asymmetries in contact binaries by means of the Coriolis effect

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...355..271z&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 355, May 20, 1990, p. 271-276.

Other

22

Asymmetry, Binary Stars, Light Curve, Stellar Models, Coriolis Effect, Equilibrium Equations, Thermodynamic Equilibrium

Scientific paper

In this study, it is proved that the isothermal surface is not identical with the isobaric surface in a static model of a contact binary system based on hydrostatic and thermal equilibrium equations. Therefore, there is a baroclinic structure in a contact binary atmosphere, and the development of circumfluence is thus inevitable. It is suggested that a static model should not be adopted in modeling a contact binary atmosphere. The asymmetry (different brightness between the maxima) commonly found among the light curves of W UMa binary systems can be explained in terms of the asymmetry of circumfluence in the contact binary stars due to the Coriolis effect.

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