Photometric Analyses of the Short-Period Contact Binaries HY Pavonis, AW Virginis, and BP Velorum

Details Photometric Analyses of the Short-Period Contact Binaries HY Pavonis, AW Virginis, and BP Velorum Photometric Analyses of the Short-Period Contact Binaries HY Pavonis, AW Virginis, and BP Velorum

Apr 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996pasp..108..332l&link_type=abstract

Publications of the Astronomical Society of the Pacific, v.108, p.332

Astronomy and Astrophysics

Astronomy

3

Cataclysmic Variables, Stars: Individual: Hy Pavonis, Stars: Individual: Aw Virginis, Stars: Individual: Bp Velorum

Scientific paper

We present BV light curve synthetic analyses of three short period contact (W UMa) binaries: HY Pavonis (P ~0.35 days), AW Virginis (P ~0.35 days), and BP Velorum (P ~0.26 days). Different possible configurations for a wide range of the mass ratio were explored in each case making use of the Wilson-Divinney code. The photometric parameters of the systems were determined from the synthetic light curve solutions that best fit the observations. AW Vir has two components of very similar temperatures and therefore the subtype (A or W) remains undetermined. HY Pav and BP Vel are best modeled by W-type configurations and the asymmetries in the light curves are reproduced by introducing cool spots on the more massive secondary components. Even when BP Vel lies in the region of the open cluster Cr 173, its distance modulus, in principle, rules it out as a cluster member. (SECTION: Stars)

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