BVR Observations and Period Variation of the Neglected Contact Binary V343 Orionis

	BVR Observations and Period Variation of the Neglected Contact Binary V343 Orionis
	Yang, Y. -G.1,2
刊名	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
	2009-07-01
卷号	121 期号:881 页码:699-707
英文摘要	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
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/8376]
专题	国家天文台_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
推荐引用方式 GB/T 7714	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.