Secular period decreasing of detached chromospherically active binaries

doi:10.1007/s10509-010-0266-5

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	Secular period decreasing of detached chromospherically active binaries
	Luo CQ(罗常青)1,2,3,4 ; Zhang, XB 4; Deng, LC 4; Luo YP(罗杨平)1,2 ; Luo, ZQ 5; Yang, SZ 5; Luo, CQ (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
发表期刊	ASTROPHYSICS AND SPACE SCIENCE
	2010-05
卷号	327 期号:1 页码:9-17
DOI	10.1007/s10509-010-0266-5
产权排序	第1完成单位
收录类别	SCI
关键词	Detached Binaries Chromospheric Active Binaries Period Decrease Magnetic Activity
摘要	The long-term orbital period changes of a large sample of detached chromospherically active binaries (CABs) were studied. Eleven such systems were found to be undergoing secular period decreases with the rates of -6.3 x 10(-9) to -1.1 x 10(-6) days per year. The period decreasing rates are found to vary depending on the orbital period. The longer the orbital period is, the more rapidly the period decreases. Following Stepien (Mon. Not. R. Astron. Soc. 274: 1019, 1995), the period decreasing rate predicted by angular momentum loss (AML) caused by magnetic wind is computed for each system. A comparison between the observed and calculated period decreasing rates shows that the former values are obviously larger than the latter by 1-3 orders of magnitude. It suggests that the magnetic wind is not likely the determinant mechanism driving the AML in these systems. Finally, the orbital angular momentum (AM) and the rate of AML, (J) over dot, are computed for each system. It shows that the AM have a similar change with the orbital period like dP/dt does, but log (J) over dot/J presents no strict changing with the kinematical ages.
项目资助者	Natural Science Foundation of China [10778719, 10773015]
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	0004-640X
URL	查看原文
WOS记录号	WOS:000276204000002
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	ANGULAR-MOMENTUM LOSS ; ORBITAL PERIOD ; CONTACT BINARIES ; CLOSE BINARIES ; SZ-PISCIUM ; MASS ; EVOLUTION ; HERCULIS
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/5200
专题	恒星物理研究组中国科学院天体结构与演化重点实验室
通讯作者	Luo, CQ (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
作者单位	1.National Astronomical Observatories/Yunnan Observatory, The Chinese Academy of Sciences, Kunming, 650011, China 2.Graduate University of Chinese Academy of Sciences, Beijing, 100049, China 3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, 650011, China 4.National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100012, China 5.Institute of Theoretical Physics, China West Normal University, Nanchong, Sichuan, 637002, China
第一作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	Luo CQ,Zhang, XB,Deng, LC,et al. Secular period decreasing of detached chromospherically active binaries[J]. ASTROPHYSICS AND SPACE SCIENCE,2010,327(1):9-17.
APA	Luo CQ.,Zhang, XB.,Deng, LC.,Luo YP.,Luo, ZQ.,...&Luo, CQ .(2010).Secular period decreasing of detached chromospherically active binaries.ASTROPHYSICS AND SPACE SCIENCE,327(1),9-17.
MLA	Luo CQ,et al."Secular period decreasing of detached chromospherically active binaries".ASTROPHYSICS AND SPACE SCIENCE 327.1(2010):9-17.

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