A Photometric Study of the Near-Contact Binary WY Tauri

作者：Yang Yuan Gui^*

来源：Publications of the Astronomical Society of Japan, 2009, 61(6): 1211-1216.

• stars: binaries: close
• stars: binaries: eclipsing
• stars: individual (WY Tauri)

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.degrees 0(+/- 0.degrees 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 x 10(-8) d 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.

• 出版日期2009
• 单位南宁师范大学