Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007pasj...59..955x&link_type=abstract
Publications of the Astronomical Society of Japan, Vol.59, No.5, pp.955--960
Astronomy and Astrophysics
Astronomy
Stars: Activity, Stars: Eclipsing Binaries, Stars: Individual (Bh Vir), Stars: Star-Spots
Scientific paper
Photoelectric light curves of BH Vir in the UBVRI bands observed by Arévalo et al. in 1986 were analyzed by using the latest version of the Wilson-Devinney program and to investigate the photometric parameters and spot activity. Satisfactory fits were obtained by assuming a hot spot only on the secondary star. The results show that the temperature of the spotted region relative to the photosphere, Ts / Tph, is 1.13 ± 0.027. The active region tends to occur at low latitude (near 81°). The results also show that the mass ratio obtained from the photoelectric light curves is q = m2 / m1 = 0.971. It is close to the spectroscopic value of 0.968 obtained by Zhai et al. (1990). The photosphere temperature of the primary is T1 = 5969 ± 11 K. After checking of the activity pattern from 1953 to 1991, the activity cycle is estimated to be about 10 yr.
Tao Xia
Tian Yongpo
Xiang Fuyuan
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