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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
发表期刊ASTRONOMICAL JOURNAL
2000-06
卷号119期号:6页码:3064-3070
DOI10.1086/301412
产权排序第1完成单位
收录类别SCI
关键词Binaries : Close Stars : Individual (Tt Delphini Stars : Mass Loss Bo Monocerotis y Piscium)
摘要The 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.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6256
URL查看原文
归档日期2000-12-31
WOS记录号WOS:000088231100041
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5742
专题双星与变星研究组
通讯作者Qian, SB
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. 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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