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BVR Observations and Period Variation of the Neglected Contact Binary V343 Orionis
Yang, Y. -G.1,2
2009-07-01
发表期刊PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
卷号121期号:881页码:699-707
摘要BVR light curves of V343 Orionis were observed with the 85 cm telescope at Xinglong Station of the National Astronomical Observatories of the Chinese Academy of Sciences, in 2007 and 2008. Using the Wilson-Devinney program, the photometric solution of V343 Ori was first deduced from those observations. Photometric results indicated that V343 Ori is an A-subtype W Ursae Majoris binary, whose mass ratio and overcontact degree are q = 0.253(+/- 0.004) and f = 86.9%(+/- 2.1%), respectively. The asymmetric light curves (i.e., O'Connell effect) were modeled by the spot model. The spot area is up to 1.21% of the area of the more massive component. All light minimum times for V343 Ori, spanning over 80 yr, were used in analyzing the orbital period change. From the O - C curve, there exists a long-term orbital period increase at a rate of dP/dt = +4.32 x 10(-7) d yr(-1), which may be caused by the mass transfer from the less massive component to the more massive one. With mass transfer, the orbital angular momentum decreases while the spin angular momentum increases. When J(spin) > 1/3 J(orb), this kind of binary (e.g., V343 Ori), with high overcontact degree and period increase, may evolve into a rapid-rotating single star.
收录类别SCI
语种英语
WOS记录号WOS:000267601700003
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文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8376
专题光学天文研究部
作者单位1.Huaibei Coal Ind Teachers Coll, Sch Phys & Elect Informat, Huaibei 235000, Anhui, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
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Yang, Y. -G.. BVR Observations and Period Variation of the Neglected Contact Binary V343 Orionis[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,2009,121(881):699-707.
APA Yang, Y. -G..(2009).BVR Observations and Period Variation of the Neglected Contact Binary V343 Orionis.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,121(881),699-707.
MLA Yang, Y. -G.."BVR Observations and Period Variation of the Neglected Contact Binary V343 Orionis".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC 121.881(2009):699-707.
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