YNAO OpenIR  > 双星与变星研究组
An orbital period investigation of the Algol-type eclipsing binary VW Hydrae
Zhang J(张嘉)1,2; Qian SB(钱声帮)1; Soonthornthum, B3; Zhang, J (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
2009-03
Volume9Issue:3Pages:307-314
DOI10.1088/1674-4527/9/3/005
Contribution Rank第1完成单位
Indexed BySCI
KeywordStars: Binaries: Close Stars: Binaries: Eclipsing Multiple Stars Stars: Individual (Vw Hya)
AbstractOrbital period variations of the Algol-type eclipsing binary, VW Hydrae, are analyzed based on one newly determined eclipse time and the other times of light minima collected from the literature. It is discovered that the orbital period shows a continuous increase at arate of dP/dt = +6.34 x 10(-7) d yr(-1) while it undergoes acyclic change with an amplitude of 0.0639 d and a period of 51.5 yr. After the long-term period increase and the large-amplitude period oscillation were subtracted from the O-C curve, the residuals of the photoelectric and CCD data indicate a small-amplitude cyclic variation with a period of 8.75 yr and a small amplitude of 0.0048 d. The continuous period increase indicates a conservative mass transfer at a rate of dM(2)/dt = 7.89 x 10(-8) M(circle dot) yr(-1) from the secondary to the primary. The period increase may be caused by a combination of the mass transfer from the secondary to the primary and the angular momentum transfer from the binary system to the circumbinary disk. The two cyclic period oscillations can be explained by light-travel time effects via the presence of additional bodies. The small-amplitude periodic change indicates the existence of a less massive component with mass M(3) > 0.53 M(circle dot), while the large-amplitude one is caused by the presence of a more massive component with mass M(4) > 2.84 M(circle dot). The ultraviolet source in the system reported by Kviz & Rufener (1987) may be one of the additional components, and it is possible that the more massive one may be an unseen neutron star or black hole. The rapid period increase and the possibility of the presence of two additional components in the binary make it a very interesting system to study. New photometric and high-resolution spectroscopic observations and a detailed investigation of those data are required m the future.
Funding OrganizationYunnan Natural Science Foundation [2005A0059M] ; National Natural Science Foundation of China [10573032, 10433030, 10573013] ; Chinese Academy of Sciences [O8ZKY11001] ; Ministry of Science and Technology of the Peoples Republic of China [2007CB815406]
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN1674-4527
URL查看原文
Archive Date2009-05-21
WOS IDWOS:000264845200005
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordCLOSE BINARIES ; MASS-TRANSFER ; LIGHT CURVES ; MODULATION ; SYSTEMS ; CYGNI
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5828
Collection双星与变星研究组
Corresponding AuthorZhang, J (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
Affiliation1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China
2.Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
3.National Astronomical Research Institute of Thailand/Ministry of Science and Technology, Bangkok, Thailand
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhang J,Qian SB,Soonthornthum, B,et al. An orbital period investigation of the Algol-type eclipsing binary VW Hydrae[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2009,9(3):307-314.
APA Zhang J,Qian SB,Soonthornthum, B,&Zhang, J .(2009).An orbital period investigation of the Algol-type eclipsing binary VW Hydrae.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,9(3),307-314.
MLA Zhang J,et al."An orbital period investigation of the Algol-type eclipsing binary VW Hydrae".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 9.3(2009):307-314.
Files in This Item:
File Name/Size DocType Version Access License
An orbital period in(303KB)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
[Zhang J(张嘉)]'s Articles
[Qian SB(钱声帮)]'s Articles
[Soonthornthum, B]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhang J(张嘉)]'s Articles
[Qian SB(钱声帮)]'s Articles
[Soonthornthum, B]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhang J(张嘉)]'s Articles
[Qian SB(钱声帮)]'s Articles
[Soonthornthum, B]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: An orbital period investigation of the Algol-type eclipsing binary VW Hydrae.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

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