A photometric study of the WUMa-type contact binary RZ Com

doi:10.1088/1009-9271/8/4/10

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	A photometric study of the WUMa-type contact binary RZ Com
	He JJ(何家佳)1,2,3 ; Qian SB(钱声帮)1,2 ; He, JJ (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
发表期刊	CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
	2008-08
卷号	8 期号:4 页码:465-471
DOI	10.1088/1009-9271/8/4/10
产权排序	第1完成单位
收录类别	SCI
关键词	Stars : Binaries : Close Stars : Binaries : Eclipsing Stars : Individual : Rz Corn
摘要	We present results of CCD photometric observations of the short-period W UMa-type contact binary system, RZ Com. The light curve of the binary has changed from W-subtype to A-subtype from 1998 to 2003, then back to W-subtype in 2004. An analysis was carried out using the 2003 version of the Wilson-Devinney code. It is confirmed that RZ Com is a low-degree, overcontact f = 20.1% (+/- 7.4%) binary system with a high inclination of i = 81.degrees 40 (+/-.degrees 40), and a mass ratio q = 2.351 (+/- 0.031). Combining four newly determined times of light minimum with others in the literature, the variations in orbital period is examined. A small-amplitude oscillation (A=0.0065d), with a period of 41.5 year, is discovered superimposed on a long-term increase at rate dP/dt = +3.97 x 10(-8)d yr(-1). The period oscillation can be explained either by the light-time effect due to the presence of an unseen third body, or by cycles of magnetic activity on the components. Combining our photometric solution with the spectroscopic elements obtained by Mclean & Hilditch, the absolute dimensions of RZ Corn are: M(1) = 1.14 (+/- 0.19)M(circle dot), M(2) = 0.50 (+/- 0.09)M(circle dot), R(1) = 1.12 (+/- 0.01)R(circle dot), R(2) = 0.78 (+/- 0.01)R(circle dot) and A = 2.41 (+/- 0.02)R(circle dot).
项目资助者	NSFC(10573032, 10433030, 10573013) ; Yunnan Natural Science Foundation(2005A0059M)
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	1009-9271
URL	查看原文
归档日期	2008-12-18
WOS记录号	WOS:000258698200010
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	ORBITAL ELEMENTS ; AM LEONIS ; SYSTEMS ; PERIOD
引用统计	被引频次：17[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/114a53/5809
专题	双星与变星研究组
通讯作者	He, JJ (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
作者单位	1.National Astronomical Observatories / Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China 2.United Laboratory of Optical Astronomy, Chinese Academy of Sciences (ULOAC), Beijing 100012, China 3.Graduate School of Chinese Academy of Sciences, Beijing 100049, 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	He JJ,Qian SB,He, JJ . A photometric study of the WUMa-type contact binary RZ Com[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2008,8(4):465-471.
APA	He JJ,Qian SB,&He, JJ .(2008).A photometric study of the WUMa-type contact binary RZ Com.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,8(4),465-471.
MLA	He JJ,et al."A photometric study of the WUMa-type contact binary RZ Com".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 8.4(2008):465-471.

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