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Photometric study of an A-type contact binary: AP Aurigae
Li LF(李立芳)1,2; Liu QY(刘清耀)1,2; Zhang FH(张奉辉)1,2; Han ZW(韩占文)1,2; Li, LF (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊ASTRONOMICAL JOURNAL
2001-02
卷号121期号:2页码:1091-1097
DOI10.1086/318731
产权排序第1完成单位
收录类别SCI
关键词Binaries : Eclipsing
摘要We present here a new photometric light curve analysis of the eclipsing binary AP Aur. The CCD photometry, performed at the Yunnan Observatory using the 1.06 m telescope, has given 179 individual data points in B and V bandpass filters. From these data we have obtained two minimum times. Based on these two minima, together with some other photoelectric minima collected from the literature, we have determined a new epoch and the rate of the period variation ((p) over dot = 1.268 x 10(-9) days cycle(-1)) of the system. The Wilson-Devinney model (first described in 1971) was used to derive the photometric solutions. AP Aur is a W UMa-type contact binary system. The mass ratio (q = m(2)/m(1) = 0.246) suggests that the system has an A-type W UMa binary configuration. We find that the asymmetry of the light curve is most likely caused by mass transfer from the secondary to the primary or a circulation effect in the common envelope. The evolutionary status is considered, and we find that AP Aur has just evolved away from the main sequence. Finally the evolutionary future of the system is discussed.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6256
URL查看原文
归档日期2001-04-28
WOS记录号WOS:000166939700039
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]URSAE-MAJORIS ; ECLIPSING BINARIES ; LIGHT-CURVE ; SYSTEMS ; CYGNI ; MODEL ; UMA
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被引频次:13[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/114a53/4395
专题大样本恒星演化研究组
通讯作者Li, LF (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
作者单位1.Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, China
2.United Laboratory for Optical Astronomy and National Astronomical Observatories, Chinese Academy of Sciences
第一作者单位中国科学院云南天文台
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Li LF,Liu QY,Zhang FH,et al. Photometric study of an A-type contact binary: AP Aurigae[J]. ASTRONOMICAL JOURNAL,2001,121(2):1091-1097.
APA Li LF,Liu QY,Zhang FH,Han ZW,&Li, LF .(2001).Photometric study of an A-type contact binary: AP Aurigae.ASTRONOMICAL JOURNAL,121(2),1091-1097.
MLA Li LF,et al."Photometric study of an A-type contact binary: AP Aurigae".ASTRONOMICAL JOURNAL 121.2(2001):1091-1097.
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