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; Liao, WP (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2015-06
卷号67期号:3
DOI10.1093/pasj/psv019
产权排序第1完成单位
收录类别SCI
关键词Binaries: Close Binaries: Eclipsing Stars: Evolution Stars: Individual (Lp Ursa Major)
摘要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.
项目资助者Chinese Natural Science Foundation [11403095, 11133007, 11325315] ; Yunnan Natural Science Foundation [2014FB187] ; Science Foundation of Yunnan Province [2012HC011] ; Chinese Academy of Sciences [XDB09010202]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6264
URL查看原文
归档日期2015-06-18
WOS记录号WOS:000356182500019
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]LIGHT CURVES ; STARS
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5917
专题双星与变星研究组
中国科学院天体结构与演化重点实验室
通讯作者Liao, WP (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
作者单位1.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
推荐引用方式
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,&Liao, WP .(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).
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
A deep, unusual over(1090KB)期刊论文作者接受稿开放获取CC BY-NC-SA浏览 请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Liao WP(廖文萍)]的文章
[Qian SB(钱声帮)]的文章
[Zhao EG(赵二刚)]的文章
百度学术
百度学术中相似的文章
[Liao WP(廖文萍)]的文章
[Qian SB(钱声帮)]的文章
[Zhao EG(赵二刚)]的文章
必应学术
必应学术中相似的文章
[Liao WP(廖文萍)]的文章
[Qian SB(钱声帮)]的文章
[Zhao EG(赵二刚)]的文章
相关权益政策
暂无数据
收藏/分享
文件名: A deep, unusual over-contact binary system with high rate of mass transfer_ LP Ursa Major.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。