The W Ursae Majoris system AK Herculis
文献类型：期刊论文
| 作者 | Li LF(李立芳)1,2 ; Zhang FH(张奉辉)1,2; Han ZW(韩占文)1,2
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| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2001-03 |
| 卷号 | 368期号:2页码:595-600 |
| 关键词 | individual star : AK Her binaries : eclipsing stars : activity |
| ISSN号 | 0004-6361 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Li, LF (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Hunnan Province, Peoples R China. |
| 英文摘要 | A detailed study of the period and the light-curve of the eclipsing binary AK Her is presented. Based on the study of the (O-C) curve, we find that the period variation of the system contains a component of a long-term decrease, and three other components of periodical variation. Our result is very different from that of other investigators. We compare light curves: obtained by other groups and find that the light curve of the system has changed considerably. Based on the analysis, we investigate the physical mechanisms which may underlie the variations of the period and the light curve and obtain some new conclusions. According to the characteristics of rapid light variation of the system, we conclude that the rapid change is probably caused by pulsation of the common envelope, and that the physic-al mechanism causing the pulsation may be mass transfer between the two components. In addition, we find that the amplitude of the light curve variation is almost proportional to the rate of the period variation. Finally, the trends in the evolution of the system are discussed. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | ORBITAL PERIOD ; CONTACT BINARIES |
| 收录类别 | SCI ; EI |
| 原文出处 | http://www.aanda.org/articles/aa/abs/2001/11/aa10499/aa10499.html |
| 语种 | 英语 |
| WOS记录号 | WOS:000168306200022 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4394]  |
| 专题 | 云南天文台_大样本恒星演化研究组 |
| 作者单位 | 1.Yunnan Observatory, Chinese Academy of Sciences, PO Box 110, Kunming, Yunnan Province 650011, PR China 2.National Astronomical Observatories, Chinese Academy of Sciences, PR China |
| 推荐引用方式 GB/T 7714 | Li LF,Zhang FH,Han ZW. The W Ursae Majoris system AK Herculis[J]. ASTRONOMY & ASTROPHYSICS,2001,368(2):595-600. |
| APA | Li LF,Zhang FH,&Han ZW.(2001).The W Ursae Majoris system AK Herculis.ASTRONOMY & ASTROPHYSICS,368(2),595-600. |
| MLA | Li LF,et al."The W Ursae Majoris system AK Herculis".ASTRONOMY & ASTROPHYSICS 368.2(2001):595-600. |
入库方式： OAI收割
来源：云南天文台
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