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 |
DOI | 10.1086/318731 |
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 |
ISSN | 0004-6256 |
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 |
引用统计 | |
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 |
推荐引用方式 GB/T 7714 | 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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