Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009pasj...61.1211y&link_type=abstract
Publications of the Astronomical Society of Japan, Vol.61, No.6, pp.1211--1216
Astronomy and Astrophysics
Astronomy
Stars: Binaries: Close, Stars: Binaries: Eclipsing, Stars: Individual (Wy Tauri)
Scientific paper
CCD photometric observations for the eclipsing binary WY Tauri are firstly presented. Three new minimum timings in 2006 and 2008 have been determined. Using Wilson-Devinney binary code, the photometric solution was simultaneously deduced from VR light curves. Photometric results indicate that WY Tau is a semi-detached binary, whose secondary component fills its Roche lobe. The mass ratio and orbital inclination are q = 0.508(±0.006) and i = 78.0°(±0.05°), respectively. The filling factor of the primary component is 84.9%, indicating that this star is a near-contact binary. Based on all available eclipse timings since 1930, it is found that the (O - C) curve may be described by either a long-term period increase or a cyclic variation. The continuous period increase at a rate of dP/dt = +4.65 × 10-8d yr-1 may be attributed to mass transferring from the secondary to the primary, identified by the semidetached configuration. With mass transferring, WY Tau may evolve into a contact binary.
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