The spot activity of BH Virginis

Details The spot activity of BH Virginis The spot activity of BH Virginis

Jan 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004newa....9...27x&link_type=abstract

New Astronomy, Volume 9, Issue 1, p. 27-31.

Astronomy and Astrophysics

Astronomy

3

Binaries: Eclipsing, Stars: Spots

Scientific paper

In this paper, photoelectric light curves of BH Vir in 4650 and 5500 Å bands observed by [PASJg, 191] were analyzed by using the 1992 version Wilson-Devinney program to investigate spot activity. The results show that: (1) There is a large cool spotted active region on the secondary star in 1953-1954. (2) Around phase 0.65 the distortion waves of two color light curves can be fitted satisfactorily with two different spot models, a cool spot in 5500 Å band, while a hot spot in 4650 Å band. (3) The mass ratio obtained from the photoelectric light curves is q=m2/m1=0.967. It is close to the spectroscopic value of 0.968 obtained by . [A&A 237, 148]. (4) The photosphere temperature of the primary is T1=6052+/-8 K.

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