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Close binaries in near and shallow contact stages
Zhu LY(朱俐颖)1,2; Qian SB(钱声帮)1,2; M. Zejda3; Z. Mikulášek3
会议录名称EAS Publications Series - Proceedings of the conference “Setting a New Standard in the Analysis of Binary Stars”
2013-02
卷号64
页码435-436
DOI10.1051/eas/1364082
会议录编者/会议主办者K. Pavlovski, A. Tkachenko and G. Torres
产权排序第1完成单位
收录类别其他
会议名称Setting a New Standard in the Analysis of Binary Stars
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摘要

After a detailed investigation of new observations obtained by small telescopes, we found a group of near and shallow contact binaries with decreasing period including BS Vul, MR Com, EP Cep, ES Cep and V369 Cep. BS Vul and V369 Cep are primary-filling near-contact binaries, while MR Com, EP Cep and ES Cep are shallow contact binaries. With their decrease in period, BS Vul and V369 Cep will evolve to the shallow-contact systems with higher mass ratios, just like ES Cep. The period decease of shallow contact binaries could be caused by the combined effect of the thermal relaxation oscillation (TRO) and variable angular momentum loss (AML). This produces contact binaries in oscillating circles that evolve towards the lower mass ratio direction. That means systems resemble ES Cep will evolve to those systems with lower mass ratio, such as MR Com and EP Cep.

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项目资助者N/A
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
文章类型Proceedings Paper
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归档日期2014-08-12
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文献类型会议论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9642
专题双星与变星研究组
中国科学院天体结构与演化重点实验室
作者单位1.Yunnan Observatories, Chinese Academy of Sciences (CAS), PO Box 110, 650011 Kunming, China
2.Key laboratory of the structure and evolution of celestial objects, Chinese Academy of Sciences, PO Box 110, 650011 Kunming, PR China
3.Department of Theoretical Physics and Astrophysics, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
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Zhu LY,Qian SB,M. Zejda,et al. Close binaries in near and shallow contact stages[C]//K. Pavlovski, A. Tkachenko and G. Torres,2013:435-436.
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