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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.
Source PublicationASTRONOMICAL JOURNAL
2001-11
Volume122Issue:5Pages:2686-2691
DOI10.1086/323455
Contribution Rank第1完成单位
Indexed BySCI
KeywordBinaries : Close Stars : Mass Loss
AbstractThe 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.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-6256
URL查看原文
Archive Date2002-01-16
WOS IDWOS:000172086100035
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5747
Collection双星与变星研究组
Corresponding AuthorQian, SB (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
Affiliation1.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
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
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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