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PERIOD CHANGES AND FOUR-COLOR LIGHT CURVES OF ACTIVE CONTACT BINARY VW BOOTIS
Liu L(刘亮)1,2,3,4; Qian SB(钱声帮)1,2,3,4; Zhu LY(朱俐颖)1,2,3,4; He JJ(何家佳)1,2,3,4; Li LJ(李临甲)1,2,3,4; Liu, L (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊ASTRONOMICAL JOURNAL
2011-05
卷号141期号:5
DOI10.1088/0004-6256/141/5/147
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 (Vw Bootis)
摘要The secured four-color light curves of VW Boo were analyzed with the 2003 version of the Wilson-Devinney code. It is confirmed that VW Boo is a shallow W-type contact binary system with a degree of contact factor f = 10.8%(+/-0.5%). Two dark spots were found on the massive cool component this time. They cause an unequal depth of the two maxima. A period investigation based on all available visual, photographic, CCD, and photoelectric data shows that the period of the system includes a long-term decrease (dP/dt = -1.454 x 10(-7) days yr(-1)) and an oscillation (A(3) = 0.0059 days; T-3 = 25.96 years). These may be caused by mass transfer, angular momentum loss, and cyclic magnetic activity.
项目资助者Chinese Natural Science Foundation [10878012, 10973037, 10903026] ; National Key Fundamental Research Project [2007CB815406] ; Yunnan Natural Science Foundation [2008CD157] ; West Light Foundation of the Chinese Academy of Sciences
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6256
URL查看原文
归档日期2011-06-20
WOS记录号WOS:000289240800006
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]THERMAL RELAXATION OSCILLATION ; URSAE MAJORIS SYSTEMS ; OVERCONTACT BINARIES ; STARS ; COMPONENTS ; VIRGINIS ; COMAE
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5856
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Liu, L (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
作者单位1.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, Yuquan Road 19, Shijingshan Block, 100049 Beijing, China
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GB/T 7714
Liu L,Qian SB,Zhu LY,et al. PERIOD CHANGES AND FOUR-COLOR LIGHT CURVES OF ACTIVE CONTACT BINARY VW BOOTIS[J]. ASTRONOMICAL JOURNAL,2011,141(5).
APA Liu L,Qian SB,Zhu LY,He JJ,Li LJ,&Liu, L .(2011).PERIOD CHANGES AND FOUR-COLOR LIGHT CURVES OF ACTIVE CONTACT BINARY VW BOOTIS.ASTRONOMICAL JOURNAL,141(5).
MLA Liu L,et al."PERIOD CHANGES AND FOUR-COLOR LIGHT CURVES OF ACTIVE CONTACT BINARY VW BOOTIS".ASTRONOMICAL JOURNAL 141.5(2011).
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