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Long-term orbital period variations for EU hydrae
Qian SB(钱声帮)1,2; Boonrucksar, S3; 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:2页码:499-502
DOI10.1093/pasj/55.2.499
产权排序第1完成单位
收录类别SCI
关键词Stars : Activity Stars : Binaries : Close Stars : Binaries : Eclipsing Stars : Individual (Eu Hydrae) Stars : Mass-loss
摘要Long-term period variations of an Algol-type eclipsing binary star, EU Hydrae, are presented based on an analysis of its O - C curve. As in the cases of other Algols studied in recent papers by one of the authors (S.-B. Qian), an alternate period change has discovered to superimpose on a secular period decrease (dP/dt = -4.8 x 10(-8) d yr(-1)). By assuming that the alternate variation is cyclic, a period of 26.5 yr and an amplitude of 0.0104 d were determined. A long-term period decrease combined with a semi-detached configuration may indicate that EU Hya is undergoing a secular angular momentum loss. Three possible mechanisms are proposed to explain the alternate period change.
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2003-06-18
WOS记录号WOS:000182614100018
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ANGULAR-MOMENTUM LOSS ; ALGOL-TYPE BINARIES ; POSSIBLE MASS ; CLOSE BINARIES ; PERSEI ; MODULATION ; DELPHINI ; CYGNI
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5767
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
3.Astronomy Research Unit, Department of Physics, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
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Qian SB,Boonrucksar, S,Qian, SB . Long-term orbital period variations for EU hydrae[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2003,55(2):499-502.
APA Qian SB,Boonrucksar, S,&Qian, SB .(2003).Long-term orbital period variations for EU hydrae.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,55(2),499-502.
MLA Qian SB,et al."Long-term orbital period variations for EU hydrae".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 55.2(2003):499-502.
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