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

	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
刊名	CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
	2008-08
卷号	8 期号:4 页码:465-471
关键词	stars : binaries : close stars : binaries : eclipsing stars : individual : RZ Corn
ISSN号	1009-9271
通讯作者	He, JJ (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	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).
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]	ORBITAL ELEMENTS ; AM LEONIS ; SYSTEMS ; PERIOD
收录类别	SCI
原文出处	http://iopscience.iop.org/1009-9271/8/4/10/
语种	英语
WOS记录号	WOS:000258698200010
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5809]
专题	云南天文台_双星与变星研究组
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
推荐引用方式 GB/T 7714	He JJ,Qian SB. 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.(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.