YNAO OpenIR  > 双星与变星研究组
THE FIRST PHOTOMETRIC INVESTIGATION OF THE NEGLECTED W-UMa-TYPE BINARY STAR UZ CMi
Qian SB(钱声帮)1,2,3; Li K(李凯)1,2,3; Liao WP(廖文萍)1,2; Liu L(刘亮)1,2,3; Zhu LY(朱俐颖)1,2; He JJ(何家佳)1,2; Wang JJ(王晶晶)1,2,3; Zhao EG(赵二刚)1,2
Source PublicationASTRONOMICAL JOURNAL
2013-04
Volume145Issue:4
DOI10.1088/0004-6256/145/4/91
Contribution Rank第1完成单位
Indexed BySCI
KeywordBinaries: Close Binaries: Eclipsing Stars: Evolution Stars: Individual (Uz Umi)
Abstract

UZ CMi was a W-UMa-type binary star found more than 80 years ago. However, it has been neglected in photometric investigations. Here, the first complete light curves in the B, V, R, and I bands are presented and analyzed using the Wilson and Devinney method. It is discovered that UZ CMi is a contact binary (f = 38.4(+/- 2.3)%) with amass ratio of 0.45. The derived orbital inclination (i = 87 degrees) indicates that it is a total eclipsing binary, which suggests that the determined parameters are reliable. By using 17 new eclipse times together with those collected from the literature, we found that the general trend of the observed-calculated (O - C) curve shows an upward parabolic variation that corresponds to a long-term increase in the orbital period at a rate of (P) over dot = +4.1 x 10(-8) days yr(-1). The continuous increase may be caused by a mass transfer from the less massive component to the more massive one. This suggests that UZ CMi is in the thermal relaxation oscillation controlled stage of the evolutionary scheme proposed by Qian. UZ CMi will oscillate around a critical mass ratio and the contact configuration cannot be broken. After the upward parabolic change was removed, the (O - C)(2) curve of the photoelectric and charge-coupled device data revealed a cyclic variation with a small amplitude of 0.0026 days and a period of 21.1 yr. The cyclic change was analyzed for the light-travel time effect via the presence of an extremely cool stellar companion.

Funding ProjectChinese Natural Science Foundation[11133007] ; Chinese Natural Science Foundation[10973037] ; Chinese Natural Science Foundation[11203066] ; Chinese Natural Science Foundation[10903026] ; West Light Foundation of the Chinese Academy of Sciences
Funding OrganizationChinese Natural Science Foundation[11133007, 10973037, 11203066, 10903026] ; West Light Foundation of the Chinese Academy of Sciences
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星天文学 ; 恒星形成与演化
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-6256
URL查看原文
Archive Date2013-03-22
WOS IDWOS:000316247300005
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordTHERMAL RELAXATION OSCILLATION ; URSAE MAJORIS SYSTEMS ; MASS-RATIO ; LIGHT CURVES ; CONTACT ; CATALOG ; CANCRI ; CYGNI ; DEEP
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5889
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 AuthorQian SB(钱声帮)
Affiliation1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences (CAS), P.O. Box 110, 650011 Kunming, China
2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China
3.University of the Chinese Academy of Sciences, Yuquan Road 19#, Sijingshang Block, 100049 Beijing, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Qian SB,Li K,Liao WP,et al. THE FIRST PHOTOMETRIC INVESTIGATION OF THE NEGLECTED W-UMa-TYPE BINARY STAR UZ CMi[J]. ASTRONOMICAL JOURNAL,2013,145(4).
APA Qian SB.,Li K.,Liao WP.,Liu L.,Zhu LY.,...&Zhao EG.(2013).THE FIRST PHOTOMETRIC INVESTIGATION OF THE NEGLECTED W-UMa-TYPE BINARY STAR UZ CMi.ASTRONOMICAL JOURNAL,145(4).
MLA Qian SB,et al."THE FIRST PHOTOMETRIC INVESTIGATION OF THE NEGLECTED W-UMa-TYPE BINARY STAR UZ CMi".ASTRONOMICAL JOURNAL 145.4(2013).
Files in This Item:
File Name/Size DocType Version Access License
THE FIRST PHOTOMETRI(820KB)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
[Qian SB(钱声帮)]'s Articles
[Li K(李凯)]'s Articles
[Liao WP(廖文萍)]'s Articles
Baidu academic
Similar articles in Baidu academic
[Qian SB(钱声帮)]'s Articles
[Li K(李凯)]'s Articles
[Liao WP(廖文萍)]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Qian SB(钱声帮)]'s Articles
[Li K(李凯)]'s Articles
[Liao WP(廖文萍)]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: THE FIRST PHOTOMETRIC INVESTIGATION OF THE NEGLECTED W-UMa-TYPE BINARY STAR UZ CMi.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

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