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

CORC > 云南天文台 > 中国科学院云南天文台 > 其他

	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
刊名	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
	2003-06
卷号	115 期号:808 页码:748-754
ISSN号	0004-6280
通讯作者	Yang, YL (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming, Peoples R China.
产权排序	第一完成单位
英文摘要	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.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	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
收录类别	SCI
原文出处	http://www.jstor.org/stable/10.1086/374913
语种	英语
WOS记录号	WOS:000182944400013
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4162]
专题	云南天文台_其他
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)
推荐引用方式 GB/T 7714	Yang YL,Liu QY. 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.(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.