YNAO OpenIR  > 双星与变星研究组
HL Aurigae: A pre-contact binary system with a solar-mass companion
Qian SB(钱声帮)1,3; Zhu LY(朱俐颖)1,3; Boonruksar, S2; Qian, SB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
Source PublicationNEW ASTRONOMY
2006-05
Volume11Issue:7Pages:503-507
DOI10.1016/j.newast.2005.12.002
Contribution Rank第1完成单位
Indexed BySCI ; EI
KeywordStars : Binaries : Close Stars : Binaries : Eclipsing Stars : Individuals : Hl Aurigae : Stars : Evolution
AbstractOrbital period changes of the near-contact binary (NCB) system, HL Aurigae, are analyzed based upon all the published CCD and photoelectric times of light minimum. It is found that the period of HL Aurigae shows it small-amplitude cyclic oscillation with a period of 6.5 years and an amplitude of 0.(d)0058 while it undergoes it secular decrease at it rate of dP/dt = -1.08 x 10(-7) days/year. The cyclic period oscillation can be interpreted either by the light-time effect of a third body or by magnetic activity cycles of the components. Since the third-body assumption is in agreement with the presence of a large amount of third light in the system discovered by Gray et al. ( 1997), we think that H L Aurigae may be a true triple system. In order to deduce a G2-type third companion its proposed by Gray et al. (1997), the orbital inclination of the third body should be i' = 400, which is much smaller than that of the eclipsing pair (i = 85.degrees 7). This suggests that the third companion is not coplanar with the eclipsing binary. This may indicate that the solar-mass component may be captured by the eclipsing binary system in some previous stages of its formation and evolution. HL Aurigae is a short-period NCB with a F1V-type primary and a G9V-type secondary component and both of the components are filling or nearly filling their Roche lobes. As the period is decreasing, the shrinking of the Roche lobe will finally cause it to evolve into it contact binary system in the timescale of similar to 2.1 x 10(6) years. The period decrease may be caused by mass transfer or/and by angular momentum loss via magnetic braking. (c) 2006 Elsevier B.V. All rights reserved.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN1384-1076
URL查看原文
Archive Date2006-04-07
WOS IDWOS:000237133600006
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordPERIOD ; PHASE
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5789
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, P.O. Box 110, 650011 Kunming, PR China
2.Astronomy Research Unit, Department of Physics, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
3.United Laboratory of Optical Astronomy, Chinese Academy of Sciences (ULOAC), 100012 Beijing, PR China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Qian SB,Zhu LY,Boonruksar, S,et al. HL Aurigae: A pre-contact binary system with a solar-mass companion[J]. NEW ASTRONOMY,2006,11(7):503-507.
APA Qian SB,Zhu LY,Boonruksar, S,&Qian, SB .(2006).HL Aurigae: A pre-contact binary system with a solar-mass companion.NEW ASTRONOMY,11(7),503-507.
MLA Qian SB,et al."HL Aurigae: A pre-contact binary system with a solar-mass companion".NEW ASTRONOMY 11.7(2006):503-507.
Files in This Item:
File Name/Size DocType Version Access License
HL Aurigae_ A pre-co(201KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Qian SB(钱声帮)]'s Articles
[Zhu LY(朱俐颖)]'s Articles
[Boonruksar, S]'s Articles
Baidu academic
Similar articles in Baidu academic
[Qian SB(钱声帮)]'s Articles
[Zhu LY(朱俐颖)]'s Articles
[Boonruksar, S]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Qian SB(钱声帮)]'s Articles
[Zhu LY(朱俐颖)]'s Articles
[Boonruksar, S]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: HL Aurigae_ A pre-contact binary system with a solar-mass companion.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.