Period changes of two W UMa-type contact binaries: RW Comae berenices and CC Comae berenices

doi:10.1086/374913

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	Period changes of two W UMa-type contact binaries: RW Comae berenices and CC Comae berenices
	Yang YL(杨毓兰)1,2 ; Liu QY(刘清耀)1,2 ; Yang, YL (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming, Peoples R China.
发表期刊	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
	2003-06
卷号	115 期号:808 页码:748-754
DOI	10.1086/374913
产权排序	第1完成单位
收录类别	SCI
摘要	From the present times of minimum light and those collected from the literature, changes in the orbital period of the two W UMa-type contact binaries RW Com and CC Com are analyzed. The results reveal that the period changes of these two systems show the same natures, with a short-term oscillation superposed on the secular decrease. For RW Com, its period shows a secular decrease at a rate of dP/dt = 0.43 x 10(-7) days yr(-1). An oscillation with a periodicity of 13.7 yr and an amplitude of DeltaP = 5.4 x 10(-7) days is superposed on the secular decrease. For CC Com, its period shows a secular decrease at a rate of dP/dt = 0.40 x 10(-7) days yr(-1). An oscillation with a periodicity of 16.1 yr and an amplitude of DeltaP = 2.8 x 10(-7) days is superposed on the secular decrease. The period secular decreases of the two systems may be explained by a mass-transfer rate of dm/dt = 0.29 x 10(-7) M(circle dot) yr(-1) for RW Com and for CC Com and dm/dt = 0.52 x 10(-7) M(circle dot) yr(-1) for CC Com. The period short-term oscillations of the two systems may be explained by the magnetic activity cycle model given by Applegate, and the parameters for the magnetic activity cycle model are presented.
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	0004-6280
URL	查看原文
归档日期	2003-11-04
WOS记录号	WOS:000182944400013
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	UBV LIGHT CURVES ; ORBITAL PERIOD ; CLOSE BINARIES ; Y-SEXTANTIS ; OVERCONTACT BINARIES ; ECLIPSING BINARIES ; URSAE MAJORIS ; V401 CYGNI ; PHOTOMETRY ; SYSTEMS
引用统计	被引频次：32[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/114a53/4162
专题	其他
通讯作者	Yang, YL (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming, Peoples R China.
作者单位	1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming, People’s Republic of China 2.United Laboratory of Optical Astronomy, Chinese Academy of Sciences (ULOAC)
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	Yang YL,Liu QY,Yang, YL . Period changes of two W UMa-type contact binaries: RW Comae berenices and CC Comae berenices[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,2003,115(808):748-754.
APA	Yang YL,Liu QY,&Yang, YL .(2003).Period changes of two W UMa-type contact binaries: RW Comae berenices and CC Comae berenices.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,115(808),748-754.
MLA	Yang YL,et al."Period changes of two W UMa-type contact binaries: RW Comae berenices and CC Comae berenices".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC 115.808(2003):748-754.

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