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Multiple color light curves and period changes investigation of the contact binary HV Aqr
Li K(李凯)1,2,3; Qian SB(钱声帮)1,2,3
Source PublicationNEW ASTRONOMY
2013-07
Volume21Pages:46-49
DOI10.1016/j.newast.2012.11.003
Contribution Rank第1完成单位
Indexed BySCI
KeywordStars: Binaries: Close Stars: Binaries: Eclipsing Stars: Individuals: Hv Aqr
Abstract

New V, R and I light curves of the short period binary system, HV Aqr, are presented. Photometric solutions were derived using the Wilson-Devinney code. Our new determined light curves do not show O'Connell effect. The nearly symmetry and complete eclipses of the light curves of HV Aqr enable us to determine high-precision photometric parameters of the binary system. The new solutions suggest that HV Aqr is a low mass ratio (q = 0.1455) deep contact binary with a contact degree off = 55.9%. Based on all available times of light minimum, we analyzed the long-term period changes of HV Aqr. A secular decrease rate of dP/dt = 8.84(+/- 0.18) x 10(-8) days yr(-1) was determined. The continuous period decrease can be explained by the mass transfer from the primary component to the secondary and angular momentum loss via magnetic stellar wind. A conservative mass transfer rate of dM(1)/dt = 1.81 x 10(-8)M(circle dot) yr(-1) and angular momentum loss rate at dJ/dt = 5.96 x 10(48) g cm(2) s(-1) yr(-1) were derived. As the orbital period decreases, the contact degree of HV Aqr will become deeper and finally it will evolve into a single rapid-rotation star. (C) 2012 Elsevier B.V. All rights reserved.

Funding ProjectChinese Natural Science Foundation[11133007] ; Chinese Natural Science Foundation[10973037] ; Chinese Natural Science Foundation[10903026] ; Chinese Natural Science Foundation[11103074] ; West Light Foundation of the Chinese Academy of Sciences
Funding OrganizationChinese Natural Science Foundation[11133007, 10973037, 10903026, 11103074] ; West Light Foundation of the Chinese Academy of Sciences
Language英语
Subject Area天文学 ; 恒星与银河系
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherELSEVIER SCIENCE BV
Publication PlacePO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
ISSN1384-1076
URL查看原文
Archive Date2013-01-11
WOS IDWOS:000314558400008
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordURSAE MAJORIS SYSTEMS ; STARS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5886
Collection双星与变星研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorLi K(李凯)
Affiliation1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, PR China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences. Graduate School of the CAS, 100049 Beijing, PR China
3.Graduate School of the CAS, 100049 Beijing, PR China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li K,Qian SB. Multiple color light curves and period changes investigation of the contact binary HV Aqr[J]. NEW ASTRONOMY,2013,21:46-49.
APA Li K,&Qian SB.(2013).Multiple color light curves and period changes investigation of the contact binary HV Aqr.NEW ASTRONOMY,21,46-49.
MLA Li K,et al."Multiple color light curves and period changes investigation of the contact binary HV Aqr".NEW ASTRONOMY 21(2013):46-49.
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