Structure and evolution of W UMa-type systems

摘要：

We summarize and discuss our recent works on the structure and evolution of low-mass W UMa-type contact binary stars. Three conclusions are given as followings: (1) The energy transfer is taken place in the radiative region of common envelope of W UMa systems; (2) The magnetic activity level of W UMa systems is weaker than that of non-contact binaries or rapid-rotating single stars; (3) The evolutionary outcome of W UMa systems might be the rapid-rotating single stars,and an average lifetime is derived to be about 7 Gyr for W UMa systems.

关键词： binaries:close stars:evolution stars:rotation stars:activity

作者: Lifang Li Fenghui Zhang Zhanwen Han Dengkai Jiang Tianyu Jiang

作者单位: National Astronomical Observatories Yunnan Observatory,Chinese Academy of Sciences,P.0.Box 110,Kunmi National Astronomical Observatories Yunnan Observatory,Chinese Academy of Sciences,P.0.Box 110,Kunmi

会议类型: 国际会议

会议名称: The 252th Symposium of the International Astronomical Union(国际天文学联合会第252届研讨会)

会议地点: 海南三亚

会议语种:英文

页码: 423-424

在线出版日期: 2008-04-06（万方平台首次上网日期，不代表论文的发表时间）