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Orbital period changes of two very short-period WUMa stars CC Com and V523 Cas: A possible evidence for TRO plus AML model
Qian SB(钱声帮)1,2,3; Shengbang, Q (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊ASTROPHYSICS AND SPACE SCIENCE
2001
卷号278期号:4页码:415-421
产权排序第1完成单位
收录类别SCI
摘要Orbital period changes of the two very short-period contact binaries, CC Com and V523 Cas, are presented. It is shown that the period of CC Com varies in secular decrease with rate of dP/dt = -4.39 x 10(-8) days/year, while the period of V523 Cas is increasing at rate of dP/dt = +9.09 x 10(-8) days/year. The physical parameters of the two W UMa stars are nearly equal which indicates that the physical properties of the two contact binaries are almost the same. The different types of period changes in the two systems may strongly suggest that, although they are undergoing secular angular momentum loss (AML), the oscillatory character predicted by thermal relaxation oscilation (TRO) theory still exist and they are on the different TRO stages, i.e., CC Com is on the shrinking TRO stage, but V523 Cas is on the expending TRO stage. The present period changes of the two systems can be explained by the combination of the TRO and the AML theories.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-640X
归档日期2002-01-23
WOS记录号WOS:000172588100006
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]URSAE MAJORIS SYSTEMS ; ANGULAR-MOMENTUM LOSS ; CONTACT BINARY STARS ; EVOLUTION
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被引频次:13[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/114a53/5751
专题双星与变星研究组
通讯作者Shengbang, Q (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
作者单位1.Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Kunming 650011, Peoples R China
3.Chinese Acad Sci, United Lab Opt Astron, Kunming 650011, Peoples R China
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GB/T 7714
Qian SB,Shengbang, Q . Orbital period changes of two very short-period WUMa stars CC Com and V523 Cas: A possible evidence for TRO plus AML model[J]. ASTROPHYSICS AND SPACE SCIENCE,2001,278(4):415-421.
APA Qian SB,&Shengbang, Q .(2001).Orbital period changes of two very short-period WUMa stars CC Com and V523 Cas: A possible evidence for TRO plus AML model.ASTROPHYSICS AND SPACE SCIENCE,278(4),415-421.
MLA Qian SB,et al."Orbital period changes of two very short-period WUMa stars CC Com and V523 Cas: A possible evidence for TRO plus AML model".ASTROPHYSICS AND SPACE SCIENCE 278.4(2001):415-421.
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