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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
DOI10.1088/1009-9271/8/4/10
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
ISSN1009-9271
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
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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
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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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