Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26as..124..499c&link_type=abstract
A & A Supplement series, Vol. 124, September 1997, 499-508.
Astronomy and Astrophysics
Astronomy
10
Stars: Binaries: Eclipsing, Stars: Late-Type, Stars: Activity, Stars: Fundamental Parameters, Stars: Individual: Bh Vir, Stars: Evolution
Scientific paper
New high-quality light curves of the late-type binary system BH Vir have been obtained during a 6 year photometric uvby and H beta monitoring program of low mass eclipsing binaries (\cite[Clement et al. 1997]{ref7}), hereafter Papers I and II. This paper presents detailed analysis of this binary based on the four light curves obtained within our program. The activity wave superimposed on the eclipse-modulated light curves has been adjusted and removed by using a new iterative application of the standard EBOP code together with truncated Fourier Series fittings. Combining the recent radial velocity curves (\cite[Popper 1995]{ref23}) with the geometrical elements deduced from the "clean" photometric light curves, the absolute parameters of the system are calculated. BH Vir appears as a binary composed by two main sequence G0 and G2 stars with solar chemical composition lying on the same isochrone (log(tau)=9.8 +/- 0.2 years). The accuracy obtained on the absolute parameters determination allows us to include BH Vir on the select group of late-type stars to be used on the estimation of the Mass-Luminosity-Relationship.
Clement R. R.
Fabregat Juan
Garcia Manuel
Reglero Victor
Suso Julia
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