Star-spots activity on BH Virginis

Details Star-spots activity on BH Virginis Star-spots activity on BH Virginis

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26as..146....7x&link_type=abstract

Astronomy and Astrophysics Supplement, v.146, p.7-12

Astronomy and Astrophysics

Astrophysics

10

Stars: Eclipsing Binaries, Stars: Star-Spots

Scientific paper

BH Virginis is a short-period RS CVn system. From our observations and archival sources we have gained an ephemeris by means of the times of minima. The light curves and the photoelectric observations in B and V obtained by Koch (\cite{Koch1967}) have been analyzed by using the Wilson-Devinney program. The principal results are as follows: (1) The mass ratio obtained from the photoelectric light curves is q = m_2/m_1=0.967, close to the spectroscopic value 0.968 obtained by Zhai et al. (\cite{Zhai1990}). (2) The photospheric temperature of the primary, T_1, at two epochs (1963-1964 and 1991) was about 5945 K-6010 K. (3) Several spotted active regions are revealed on both components in 1963-1964 data sets, while only one small spotted active region appears on the secondary star in 1991.

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