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A period investigation of the overcontact binary system V417 Aquilae
Qian, SB
2003-03-01
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN0004-6361
Volume400Issue:2Pages:649-653
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.
Keywordstars : binaries : close stars : binaries : eclipsing stars : individual : V417 Aql stars : evolution
DOI10.1051/0004-6361:20030018
WOS KeywordURSAE MAJORIS SYSTEMS ; ORBITAL PERIOD ; ECLIPSING BINARIES ; CONTACT BINARIES ; CLOSE BINARIES ; LIGHT-CURVE ; MODULATION ; EVOLUTION
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000181298700028
PublisherE D P SCIENCES
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/37446
Collection中国科学院国家天文台
Corresponding AuthorQian, SB
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China
2.Chinese Acad Sci, United Lab Opt Astron, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Qian, SB. A period investigation of the overcontact binary system V417 Aquilae[J]. ASTRONOMY & ASTROPHYSICS,2003,400(2):649-653.
APA Qian, SB.(2003).A period investigation of the overcontact binary system V417 Aquilae.ASTRONOMY & ASTROPHYSICS,400(2),649-653.
MLA Qian, SB."A period investigation of the overcontact binary system V417 Aquilae".ASTRONOMY & ASTROPHYSICS 400.2(2003):649-653.
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