YNAO OpenIR  > 双星与变星研究组
A deep, unusual over-contact binary system with high rate of mass transfer: LP Ursa Major
Liao WP(廖文萍)1,2; Qian SB(钱声帮)1,2,3; Zhao EG(赵二刚)1,2,3; Li LJ(李临甲)1,2,3
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2015-06
Volume67Issue:3
DOI10.1093/pasj/psv019
Contribution Rank第1完成单位
Indexed BySCI
KeywordBinaries: Close Binaries: Eclipsing Stars: Evolution Stars: Individual (Lp Ursa Major)
Abstract

We observed the well-known unusual deep over-contact binary in 2012 and 2013. A new set of light curves and eight new observed times of light minima were derived. A total of 130 available CCD times of light minima were analyzed. The highest rate of long-term period increase in W UMa stars (+10.21 s century(-1)) was confirmed. The rapid period increase implies that the primary is accreting mass from the secondary at a high rate of M over dot = 5.3 x 10(-6) M-circle dot yr(-1). The asymmetric light curves (i.e., the O'Connell effect) were analyzed with the Wilson-Devinney Code. It was found that the spotted photometric solution with the third light is the best one for fitting the light curves. The main photometric results confirmed that LP UMa is an unusual WUMa system with a high mass ratio (q = 0.823 +/- 0.003), deep-contact configuration (f = 66.6%+/- 3.1%), and a temperature difference of Delta T = 700 K. The period increase in LPUMa may be a part of a long-period cyclic change because of the large third light contributions to the total system (61.52% in V, 61.39% in R, and 61.36% in I). All of these quite different properties make LPUMa a very interesting system to study. The possible evolutionary stage is also discussed.

Funding ProjectChinese Natural Science Foundation[11403095] ; Chinese Natural Science Foundation[11133007] ; Chinese Natural Science Foundation[11325315] ; Yunnan Natural Science Foundation[2014FB187] ; Science Foundation of Yunnan Province[2012HC011] ; Chinese Academy of Sciences[XDB09010202]
Funding OrganizationChinese Natural Science Foundation[11403095, 11133007, 11325315] ; Yunnan Natural Science Foundation[2014FB187] ; Science Foundation of Yunnan Province[2012HC011] ; Chinese Academy of Sciences[XDB09010202]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星形成与演化
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherOXFORD UNIV PRESS
Publication PlaceGREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0004-6264
URL查看原文
Archive Date2015-06-18
WOS IDWOS:000356182500019
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordLIGHT CURVES ; STARS
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5917
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 AuthorLiao WP(廖文萍)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences (CAS), P.O. Box 110, 650011 Kunming, P.R. China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650011 Kunming, P.R. China
3.University of the Chinese Academy of Sciences, Yuquan Road 19#, Shijingshan Block, 100049 Beijing, P.R. China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Liao WP,Qian SB,Zhao EG,et al. A deep, unusual over-contact binary system with high rate of mass transfer: LP Ursa Major[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2015,67(3).
APA Liao WP,Qian SB,Zhao EG,&Li LJ.(2015).A deep, unusual over-contact binary system with high rate of mass transfer: LP Ursa Major.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,67(3).
MLA Liao WP,et al."A deep, unusual over-contact binary system with high rate of mass transfer: LP Ursa Major".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 67.3(2015).
Files in This Item:
File Name/Size DocType Version Access License
A deep, unusual over(1090KB)期刊论文出版稿开放获取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
[Liao WP(廖文萍)]'s Articles
[Qian SB(钱声帮)]'s Articles
[Zhao EG(赵二刚)]'s Articles
Baidu academic
Similar articles in Baidu academic
[Liao WP(廖文萍)]'s Articles
[Qian SB(钱声帮)]'s Articles
[Zhao EG(赵二刚)]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Liao WP(廖文萍)]'s Articles
[Qian SB(钱声帮)]'s Articles
[Zhao EG(赵二刚)]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: A deep, unusual over-contact binary system with high rate of mass transfer_ LP Ursa Major.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

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