Orbital period studies of three algols: TW And, RW Leo, and AY Vul | |
Qian SB(钱声帮)1,2 | |
发表期刊 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN |
2003 | |
卷号 | 55期号:1页码:289-295 |
DOI | 10.1093/pasj/55.1.289 |
产权排序 | 第1完成单位 |
收录类别 | SCI ; EI |
关键词 | Stars : Binaries : Close Stars : Individuals (Tw And RW Leo, AY Vul) Stars : Triple Systems |
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. |
语种 | 英语 |
学科领域 | 天文学 ; 恒星与银河系 ; 恒星形成与演化 |
学科门类 | 理学 ; 理学::天文学 |
文章类型 | Article |
ISSN | 0004-6264 |
URL | 查看原文 |
归档日期 | 2003-04-02 |
WOS记录号 | WOS:000181441500023 |
WOS研究方向 | Astronomy & Astrophysics |
WOS类目 | Astronomy & Astrophysics |
关键词[WOS] | BINARIES ; CYGNI |
EI入藏号 | 20215211378324 |
EI主题词 | Stars |
EI分类号 | 641.3 Mass Transfer - 657.2 Extraterrestrial Physics and Stellar Phenomena - 801 Chemistry |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ynao.ac.cn/handle/114a53/5766 |
专题 | 双星与变星研究组 |
通讯作者 | Qian SB(钱声帮) |
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 |
第一作者单位 | 中国科学院云南天文台 |
通讯作者单位 | 中国科学院云南天文台 |
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. |
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