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Possible mass and angular momentum loss in Algol-type binaries. V. RT Persei and TX Ursae majoris
Qian SB(钱声帮)1,2; Qian, SB (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊ASTRONOMICAL JOURNAL
2001-11
卷号122期号:5页码:2686-2691
DOI10.1086/323455
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收录类别SCI
关键词Binaries : Close Stars : Mass Loss
摘要The changes in the orbital periods of two EA-type eclipsing binaries, RT Per and TX UMa, are studied in detail, based on the analysis of their times of minimum light. For RT Per, it is shown that the trend of the O-C curve can be described by a parabola opening at the bottom, which indicates a secular period decrease at the rate dP/dt -9.29 x 10(-8) days yr(-1). By subtracting the secular decrease in the O-C curve, the residuals display an oscillatory variation that can either be described by a continuous periodic change, indicating the presence of a third body, or by several linear ephemerides, indicating several sudden period jumps. Since the oscillatory change is not strictly periodic, the latter is more plausible, which suggests that several irregular period jumps are superposed on the long-term period decrease. For the other object, TX UMa, it is discovered that the O-C trend also suggests a secular period decrease (dP/dt = -7.13 x 10(-7) days yr(-1)), and five irregular period jumps are found superposed on the secular period decrease. This kind of period is not unique for Algol-type binary systems. The period changes, both the secular decrease and the sudden jumps, can be plausibly explained by orbital angular momentum loss via magnetic coupling and gravity coupling between the components.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6256
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归档日期2002-01-16
WOS记录号WOS:000172086100035
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
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被引频次:14[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5747
专题双星与变星研究组
通讯作者Qian, SB (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
作者单位1.Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China
2.National Astronomical Observatories and United Laboratory of Optical Astronomy, Chinese Academy of Sciences
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Qian SB,Qian, SB . Possible mass and angular momentum loss in Algol-type binaries. V. RT Persei and TX Ursae majoris[J]. ASTRONOMICAL JOURNAL,2001,122(5):2686-2691.
APA Qian SB,&Qian, SB .(2001).Possible mass and angular momentum loss in Algol-type binaries. V. RT Persei and TX Ursae majoris.ASTRONOMICAL JOURNAL,122(5),2686-2691.
MLA Qian SB,et al."Possible mass and angular momentum loss in Algol-type binaries. V. RT Persei and TX Ursae majoris".ASTRONOMICAL JOURNAL 122.5(2001):2686-2691.
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