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DEEP, LOW-MASS RATIO OVERCONTACT BINARY SYSTEMS. XII. CK BOOTIS WITH POSSIBLE CYCLIC MAGNETIC ACTIVITY AND ADDITIONAL COMPANION
Yang, YG1,2; Qian SB(钱声帮)2,3; Soonthornthum, B4; Yang, YG (reprint author), Huaibei Normal Univ, Sch Phys & Elect Informat, Huaibei 235000, Anhui, Peoples R China.
Source PublicationASTRONOMICAL JOURNAL
2012-05
Volume143Issue:5
DOI10.1088/0004-6256/143/5/122
Contribution Rank第3完成单位
Indexed BySCI
KeywordBinaries: Close Binaries: Eclipsing Stars: Individual (Ck Bootis)
AbstractWe present precision CCD photometry, a period study, and a two-color simultaneous Wilson code solution of the short-period contact binary CK Bootis. The asymmetric light curves were modeled by a dark spot on the primary component. The result identifies that CK Boo is an A-type W UMa binary with a high fillout of f = 71.7(+/- 4.4)%. From the O-C curve, it is found that the orbital period changes in a complicated mode, i.e., a long-term increase with two sinusoidal variations. One cyclic oscillation with a period of 10.67(+/- 0.20) yr may result from magnetic activity cycles, which are identified by the variability of Max. I - Max. II. Another sinusoidal variation (i.e., A = 0.0131 days(+/- 0.0009 days) and P-3 = 24.16(+/- 0.64) yr) may be attributed to the light-time effect due to a third body. This kind of additional companion can extract angular momentum from the central binary system. The orbital period secularly increases at a rate of dP/dt = +9.79(+/- 0.80) x 10(-8) days yr(-1), which may be interpreted by conservative mass transfer from the secondary to the primary. This kind of deep, low-mass ratio overcontact binaries may evolve into a rapid-rotating single star, only if the contact configuration do not break down at J(spin) > (1/3)J(orb).
Funding OrganizationNational Natural Science Foundation of China [10778707, 11133007] ; Anhui Provincial Natural Science Foundation [1208085MA04] ; Key Laboratory for the Structure and Evolution of Celestial Objects [OP201110]
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-6256
URL查看原文
WOS IDWOS:000302954200019
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordCONTACT BINARIES ; ORBITAL PERIOD ; PHYSICAL PARAMETERS ; CLOSE BINARIES ; LIGHT CURVES ; STARS ; COMPONENTS ; VELOCITY ; SEARCH ; CYGNI
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5869
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 AuthorYang, YG (reprint author), Huaibei Normal Univ, Sch Phys & Elect Informat, Huaibei 235000, Anhui, Peoples R China.
Affiliation1.School of Physics and Electronic Information, Huaibei Normal University, 235000 Huaibei, Anhui Province, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
3.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, 650011 Kunming, China
4.National Astronomical Research Institute of Thailand/Ministry of Science and Technology, Bangkok, Thailand
Recommended Citation
GB/T 7714
Yang, YG,Qian SB,Soonthornthum, B,et al. DEEP, LOW-MASS RATIO OVERCONTACT BINARY SYSTEMS. XII. CK BOOTIS WITH POSSIBLE CYCLIC MAGNETIC ACTIVITY AND ADDITIONAL COMPANION[J]. ASTRONOMICAL JOURNAL,2012,143(5).
APA Yang, YG,Qian SB,Soonthornthum, B,&Yang, YG .(2012).DEEP, LOW-MASS RATIO OVERCONTACT BINARY SYSTEMS. XII. CK BOOTIS WITH POSSIBLE CYCLIC MAGNETIC ACTIVITY AND ADDITIONAL COMPANION.ASTRONOMICAL JOURNAL,143(5).
MLA Yang, YG,et al."DEEP, LOW-MASS RATIO OVERCONTACT BINARY SYSTEMS. XII. CK BOOTIS WITH POSSIBLE CYCLIC MAGNETIC ACTIVITY AND ADDITIONAL COMPANION".ASTRONOMICAL JOURNAL 143.5(2012).
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