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Orbital period studies of three algols: TW And, RW Leo, and AY Vul
Qian SB(钱声帮)1,2; Qian, SB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2003
卷号55期号:1页码:289-295
DOI10.1093/pasj/55.1.289
产权排序第1完成单位
收录类别SCI
关键词Stars : Binaries : Close Ay Vul) Stars : Individuals (Tw And Stars : Triple Systems Rw Leo
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Astronomy & Astrophysics
文章类型Article
ISSN0004-6264
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
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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 (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
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
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Qian SB,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,&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,et al."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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