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PERIOD CHANGES AND FOUR-COLOR LIGHT CURVES OF THE ACTIVE OVERCONTACT BINARY V396 MONOCEROTIS
Liu L(刘亮)1,2,3,4; Qian SB(钱声帮)1,2,3,4; Liao WP(廖文萍)1,2,3,4; He JJ(何家佳)1,2,3,4; Zhu LY(朱俐颖)1,2,3,4; Li LJ(李临甲)1,2,3,4; Zhao EG(赵二刚)1,2,3,4; Liu, L (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
Source PublicationASTRONOMICAL JOURNAL
2011-02
Volume141Issue:2
DOI10.1088/0004-6256/141/2/44
Contribution Rank第1完成单位
Indexed BySCI
KeywordBinaries: Close Binaries: Eclipsing Stars: Evolution Stars: Individual (V396 Mon)
AbstractThis paper analyzes the first obtained four-color light curves of V396 Mon using the 2003 version of the W-D code. It is confirmed that V396 Mon is a shallow W-type contact binary system with a mass ratio q = 2.554(+/- 0.004) and a degree of contact factor f = 18.9%(+/- 1.2%). A period investigation based on all available data shows that the period of the system includes a long-term decrease (dP/dt = -8.57 x 10(-8) days yr(-1)) and an oscillation (A(3) = 0.0160 day, T-3 = 42.4 yr). They are caused by angular momentum loss and light-time effect, respectively. The suspect third body is possibly a small M-type star (about 0.31 solar mass). Though some observations indicate that this system has strong magnetic activity, by our analysis we found that the Applegate mechanism cannot explain the periodic changes. This binary is an especially important system according to Qian's statistics of contact binaries as its mass ratio lies near the proposed pivot point about which the physical structure of contact binaries supposedly oscillates.
Funding OrganizationYunnan Natural Science Foundation [2008CD157] ; Chinese Natural Science Foundation [10878012, 10973037, 10903026] ; Ministry of Science and Technology of the People's Republic of China [2007CB815406] ; Chinese Academy of Sciences [O8ZKY11001]
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-6256
URL查看原文
Archive Date2011-02-23
WOS IDWOS:000286186100016
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordTHERMAL RELAXATION OSCILLATION ; MASS-RATIO ; STARS ; SYSTEMS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5858
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 AuthorLiu, L (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
Affiliation1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650011 Kunming, China
3.United Laboratory of Optical Astronomy, Chinese Academy of Sciences (ULOAC), 100012 Beijing, China
4.Graduate School of the CAS, Beijing, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Liu L,Qian SB,Liao WP,et al. PERIOD CHANGES AND FOUR-COLOR LIGHT CURVES OF THE ACTIVE OVERCONTACT BINARY V396 MONOCEROTIS[J]. ASTRONOMICAL JOURNAL,2011,141(2).
APA Liu L.,Qian SB.,Liao WP.,He JJ.,Zhu LY.,...&Liu, L .(2011).PERIOD CHANGES AND FOUR-COLOR LIGHT CURVES OF THE ACTIVE OVERCONTACT BINARY V396 MONOCEROTIS.ASTRONOMICAL JOURNAL,141(2).
MLA Liu L,et al."PERIOD CHANGES AND FOUR-COLOR LIGHT CURVES OF THE ACTIVE OVERCONTACT BINARY V396 MONOCEROTIS".ASTRONOMICAL JOURNAL 141.2(2011).
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