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A period investigation of the overcontact binary system V417 Aquilae
Qian SB(钱声帮)1,2; Qian, SB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊ASTRONOMY & ASTROPHYSICS
2003-03
卷号400期号:2页码:649-653
DOI10.1051/0004-6361:20030018
产权排序第1完成单位
收录类别SCI ; EI
关键词Stars : Binaries : Close Stars : Binaries : Eclipsing Stars : Individual : V417 Aql Stars : Evolution
摘要A detailed orbital period investigation of the short-period (P = 0.(d)37) W UMa type star, V417 Aq1, is presented based on the analysis of its O-C data. It is shown that the period change of the binary system is continuous. A periodic variation, with a period of 42.4 years and an amplitude of 0.(d)0130, is found superimposed on a long-term period decrease (dP/dt = 5.50 x 10(-8) days/year). The period oscillation can be explained either by the light-time effect via the presence of an unseen third body or by magnetic activity cycles of the components. V417 Aq1 is a W-type overcontact binary system with a low mass ratio of q = 0.36. The long-term period variation is in agreement with the conclusion of Qian (2001b) that a low-mass ratio W-type system usually shows a secular period decrease. This suggests that V417 Aq1 is on the AML-controlled stage of the evolutionary scheme proposed by Qian (2001b). Meanwhile, the light-curve paradox encountered by TRO theory is discussed.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6361
URL查看原文
归档日期2003-04-07
WOS记录号WOS:000181298700028
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]URSAE MAJORIS SYSTEMS ; ORBITAL PERIOD ; ECLIPSING BINARIES ; CONTACT BINARIES ; CLOSE BINARIES ; LIGHT-CURVE ; MODULATION ; EVOLUTION
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5765
专题双星与变星研究组
通讯作者Qian, SB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
作者单位1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, PO Box 110, 650011 Kunming, PR China
2.United Laboratory of Optical Astronomy, Chinese Academy of Science (ULOAC), 100012 Beijing, PR China
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Qian SB,Qian, SB . A period investigation of the overcontact binary system V417 Aquilae[J]. ASTRONOMY & ASTROPHYSICS,2003,400(2):649-653.
APA Qian SB,&Qian, SB .(2003).A period investigation of the overcontact binary system V417 Aquilae.ASTRONOMY & ASTROPHYSICS,400(2),649-653.
MLA Qian SB,et al."A period investigation of the overcontact binary system V417 Aquilae".ASTRONOMY & ASTROPHYSICS 400.2(2003):649-653.
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