Contact Binaries: A Study of the Proximity Effects and Gravity Darkening Based on Kopal's Fourier Method

Details Contact Binaries: A Study of the Proximity Effects and Gravity Darkening Based on Kopal's Fourier Method Contact Binaries: A Study of the Proximity Effects and Gravity Darkening Based on Kopal's Fourier Method

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005ap%26ss.296..359n&link_type=abstract

Astrophysics and Space Science, Volume 296, Issue 1-4, pp. 359-370

Astronomy and Astrophysics

Astrophysics

Binary Stars, W Uma-Type Stars, Proximity Effects, Gravity Darkening

Scientific paper

A new method for the determination of the proximity effects and gravity darkening exponents in contact binaries of W UMa type is presented. The method is based on Kopal’s method of Fourier analysis of the light changes of eclipsing variables in the Frequency Domain. The method was applied to 36 W UMa systems for which geometric and photometric elements have been derived by the most powerful techniques. The derived values are very close to those predicted by the existing theory of radiative transfer or convective equilibrium.

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