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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.
Source PublicationASTRONOMY & ASTROPHYSICS
2003-03
Volume400Issue:2Pages:649-653
DOI10.1051/0004-6361:20030018
Contribution Rank第1完成单位
Indexed BySCI ; EI
KeywordStars : Binaries : Close Stars : Binaries : Eclipsing Stars : Individual : V417 Aql Stars : Evolution
AbstractA 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.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-6361
URL查看原文
Archive Date2003-04-07
WOS IDWOS:000181298700028
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordURSAE MAJORIS SYSTEMS ; ORBITAL PERIOD ; ECLIPSING BINARIES ; CONTACT BINARIES ; CLOSE BINARIES ; LIGHT-CURVE ; MODULATION ; EVOLUTION
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5765
Collection双星与变星研究组
Corresponding AuthorQian, SB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
Affiliation1.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
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
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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