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An Investigation of Mass Transfer in Near Contact Binaries (NCBs)
Zhu LY(朱俐颖)1,2; Qian SB(钱声帮)1,2
会议录名称Proceedings of the 11th Asian-Pacific Regional IAU Meeting (APRIM2011) - NARIT Conference Series
2013
卷号1
页码150-152
会议录编者/会议主办者S. Komonjinda, Y. Y. Kovalev, and D. Rufollo
产权排序第1完成单位
收录类别其他
会议名称the 11th Asian-Pacific Regional IAU Meeting (APRIM 2011)
会议日期2011-07-26
会议地点Chiang Mai, Thailand
摘要

Near-contact binaries (NCB) are interesting with their marginal contact nature, i.e., one or both of the components at or close to the critical Roche Lobe. Once a component fills its critical Roche Lobe, mass transfer will occur. Therefore, NCBs are good targets to study mass transfer occurring in close binaries. We thus investigated a group of NCBs and found that the light curves of NCBs with primary components filling their critical Roche Lobe always show enhanced luminosity around the left shoulder of secondary minimum in their light curves and decreasing orbital periods. This implies that the mass transfer plays an important role in the evolution of NCBs. On the other hand, only a few systems are found to have asymmetric light curves among NCBs with secondary components filling their critical Roche Lobe. And the detected amplitude of reducing magnitude of them are very small, not more than 0.01 mag in V band. However, the amplitude of reducing magnitude found in other type NCBs are all larger than 0.01 mag. This may suggest that the mass transfer from the primary component to the secondary one is stronger than that from the opposite direction. Furthermore, we investigated some related systems, i.e. W UMa overcontact binaries and high fill-out extreme mass Ratio overcontact binary systems, and suggested an evolutionary sequence with case A mass transfer.

资助项目Chinese Natural Science Foundation[11133007] ; Chinese Natural Science Foundation[10973037] ; Chinese Natural Science Foundation[10903026] ; Chinese Natural Science Foundation[11003040] ; Yunnan Natural Science Foundation[2008CD157]
项目资助者Chinese Natural Science Foundation ; Yunnan Natural Science Foundation
语种英语
学科领域天文学 ; 天体物理学 ; 恒星与银河系
学科门类理学 ; 理学::天文学
归档日期2013-07-22
文献类型会议论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9637
专题双星与变星研究组
通讯作者Zhu LY(朱俐颖)
作者单位1.National Astronomical Observatories/Yunnan Astronomical Observatory, Chinese Academy of Science, P. O. Box 110, 650011 Kunming, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650011 Kunming, China
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Zhu LY,Qian SB. An Investigation of Mass Transfer in Near Contact Binaries (NCBs)[C]//S. Komonjinda, Y. Y. Kovalev, and D. Rufollo,2013:150-152.
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