An analysis of basic parameters and SPOT activities of the solartype binary system BH Virginis.
Abstract
The extended WilsonDevinney program, which includes the function of the differential corrections of spot parameters, was used to perform a reanalysis of the photoelectric UBV light curves of the shortperiod eclipsing binary BH Virginis in 19631964 obtained by Koch (1967) and the radial velocity curve obtained in 19641965 by Abt (1965). The mass ratio obtained form the photoelectric light curves and the radial velocity curves are 0.967 + or  0.012 and 0.968 + or  0.046, respectively. The absolute dimensions derived are M1 = (0.85 + or  0.08) solar mass, M2 = (0.83 + or  0.09) solar mass, R1 = (1.17 + or  0.04) solar radius, and R2 = (1.05 + or  0.03) solar radius. Both components have radii appreciably larger than the main sequence radius for the same mass. The distortion waves of light curves at two epochs can be fitted satisfactorily with a twospot model.
 Publication:

Astronomy and Astrophysics
 Pub Date:
 October 1990
 Bibcode:
 1990A&A...237..148Z
 Keywords:

 Eclipsing Binary Stars;
 Light Curve;
 Starspots;
 Ubv Spectra;
 Electrophotometers;
 Point Sources;
 Radial Velocity;
 Stellar Mass;
 Astrophysics