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The first CCD photometric study of the neglected WUMa-type binary PP Lacertae
Qian SB(钱声帮)1; Zhu LY(朱俐颖)1; Boonruksar, S2; Qian, SB (reprint author), Chinese Acad Sci, United Lab Opt Astron, Beijing 100012, Peoples R China.
发表期刊NEW ASTRONOMY
2005-10
卷号11期号:1页码:52-58
DOI10.1016/j.newast.2005.06.003
产权排序第1完成单位
收录类别SCI ; EI
关键词Stars : Binaries : Close Stars : Binaries : Eclipsing Stars : Individuals : Pp Lacertae
摘要The first complete charge couple device (CCD) photometric light curve in V band of the neglected W UMa-type binary star, PP Lacertae, is presented. It is shown that the system is a complete eclipsing binary and belongs to W type according to Binnendijk's classification where the occultation minimum is much deep than the transit one. The light curve is symmetric and no day-to-day variation of the light curve was found. These properties enable good chance to determine photometric parameters of the binary system. Photometric solutions based on the complete light curve were derived with the 2003 version of the W-D code. It is suggested that PP Lacertae is a W-type overcontact binary system with a mass ratio of q = 2.3000(+/- 0.0044) and a median degree of overcontact off = 23.9%(+/- 1.1%). The temperature of the less massive component is about 260 K higher than that of the more massive one. Our four CCD times of light minimum, including others collected from the literature, have been used for the period study. It is found that the period showed a small-amplitude cyclic oscillation with a period of 19.7 years and an amplitude of 0.(d)0058, which can be explained as the light-time effect of an unseen third body. (C) 2005 Elsevier B.V. All rights reserved.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN1384-1076
URL查看原文
归档日期2005-10-25
WOS记录号WOS:000232917200005
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]THERMAL RELAXATION OSCILLATION ; ORBITAL PERIOD MODULATION ; AO-CAMELOPARDALIS ; CONTACT BINARIES ; CLOSE BINARIES ; LIGHT CURVES ; STARS ; SYSTEMS ; LEONIS
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5776
专题双星与变星研究组
通讯作者Qian, SB (reprint author), Chinese Acad Sci, United Lab Opt Astron, Beijing 100012, Peoples R China.
作者单位1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, Yunnan Province 650011, Kunming, PR China
2.Astronomy Research Unit, Department of Physics, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailan
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Qian SB,Zhu LY,Boonruksar, S,et al. The first CCD photometric study of the neglected WUMa-type binary PP Lacertae[J]. NEW ASTRONOMY,2005,11(1):52-58.
APA Qian SB,Zhu LY,Boonruksar, S,&Qian, SB .(2005).The first CCD photometric study of the neglected WUMa-type binary PP Lacertae.NEW ASTRONOMY,11(1),52-58.
MLA Qian SB,et al."The first CCD photometric study of the neglected WUMa-type binary PP Lacertae".NEW ASTRONOMY 11.1(2005):52-58.
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