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Possible mass and angular momentum loss in Algol-type binaries. II. TT Delphini, BO Monocerotis, and Y Piscium
Qian SB(钱声帮)1,2; Qian, SB
Source PublicationASTRONOMICAL JOURNAL
2000-06
Volume119Issue:6Pages:3064-3070
DOI10.1086/301412
Contribution Rank第1完成单位
Indexed BySCI
KeywordBinaries : Close Stars : Individual (Tt Delphini Stars : Mass Loss Bo Monocerotis y Piscium)
AbstractThe period variations of three Algol-type binaries, TT Del, BO Mon, and Y Psc, are studied based on the analysis of the O-C observations. The orbital period of TT Del is discovered to be decreasing at a rate dP/dt = -2.20 x 10(-6) days yr(-1), while the orbital periods of BO Mon and Y Psc vary in some complex ways. For BO Mon, three abrupt changes in its orbital period are found while it undergoes secular decrease at a rate dP/dt = -2.36 x 10(-6) days yr(-1). For the remaining one, Y Pac, two jumps in the orbital period are found to superpose on a rapid period decrease (dP/df = -4.90 x 10-6 days yr(-1)). As in the case of TU Her (Paper I), the rapid decrease in the orbital periods of these systems, combined with their semidetached configurations, suggests that they may be undergoing rapid mass and angular momentum loss (AML) due to magnetic braking. With the present decrease rate, after (7-9) x 10(5) yr they will evolve into contact binaries. The abrupt changes that are superposed on the rapid period decrease may be caused by the interplay between the variable AML and variable magnetic coupling.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-6256
URL查看原文
Archive Date2000-12-31
WOS IDWOS:000088231100041
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5742
Collection双星与变星研究组
Corresponding AuthorQian, SB
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. II. TT Delphini, BO Monocerotis, and Y Piscium[J]. ASTRONOMICAL JOURNAL,2000,119(6):3064-3070.
APA Qian SB,&Qian, SB.(2000).Possible mass and angular momentum loss in Algol-type binaries. II. TT Delphini, BO Monocerotis, and Y Piscium.ASTRONOMICAL JOURNAL,119(6),3064-3070.
MLA Qian SB,et al."Possible mass and angular momentum loss in Algol-type binaries. II. TT Delphini, BO Monocerotis, and Y Piscium".ASTRONOMICAL JOURNAL 119.6(2000):3064-3070.
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