Orbital period studies of three algols: TW And, RW Leo, and AY Vul
文献类型：期刊论文
| 作者 | Qian SB(钱声帮)1,2
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| 刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
 |
| 出版日期 | 2003 |
| 卷号 | 55期号:1页码:289-295 |
| 关键词 | stars : binaries : close stars : individuals (TW And, RW Leo AY Vul) stars : triple systems |
| ISSN号 | 0004-6264 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Qian, SB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China. |
| 英文摘要 | The changes in the orbital periods of three EA-type eclipsing binaries, TW And, RW Leo, and AY Vul, are discussed based on an analysis of their 0 - C curves. For RW Leo, its orbital period was revised and, assuming a cyclic oscillation in the orbital period, a period of 38.4 yr was determined. For the other two systems, TW And and AY Vul, their 0 - C diagrams show complex variations. Under the assumption of periodic oscillation, cyclic changes with periods of 56.4 and 78.6 yr were discovered to superimpose on upward parabolic changes, indicating a secular period increase. The secular period increases for the two binary systems indicate that they are on an active phase of mass transfer. Assuming the oscillations in the periods to be caused by light-time effects due to the presence of "third bodies" rotating around these binary stars, the orbital parameters of the third bodies were determined. For RW Leo, it is possible to detect an additional third body photometrically and spectroscopically. However, for the other two systems, TW And and AY Vul, it is less likely to see additional bodies, unless the orbital inclination is very small (i.e., i' < 30degrees). New photometric and spectroscopic observations and a careful analysis of those data are needed to check the presence of third bodies. |
| 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] | BINARIES ; CYGNI |
| 收录类别 | SCI |
| 原文出处 | http://pasj.oxfordjournals.org/content/55/1/289 |
| 语种 | 英语 |
| WOS记录号 | WOS:000181441500023 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5766]  |
| 专题 | 云南天文台_双星与变星研究组 |
| 作者单位 | 1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, P. R. China 2.United Laboratory of Optical Astronomy, Chinese Academy of Sciences (ULOAC), 100012 Beijing, P. R. China |
| 推荐引用方式 GB/T 7714 | Qian SB. Orbital period studies of three algols: TW And, RW Leo, and AY Vul[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2003,55(1):289-295. |
| APA | Qian SB.(2003).Orbital period studies of three algols: TW And, RW Leo, and AY Vul.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,55(1),289-295. |
| MLA | Qian SB."Orbital period studies of three algols: TW And, RW Leo, and AY Vul".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 55.1(2003):289-295. |
入库方式： OAI收割
来源：云南天文台
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