THE FIRST PHOTOMETRIC ANALYSIS OF THE NEAR CONTACT BINARY IR Cas
Li, Kai1,2; Hu, S. -M.1; Guo, D. -F.1; Jiang, Y. -G.1; Gao, D. -Y.1; Chen, X.1; Li, K (reprint author), Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Peoples R China.
发表期刊ASTRONOMICAL JOURNAL
2014-11
卷号148期号:5
DOI10.1088/0004-6256/148/5/96
收录类别SCI
关键词Binaries: Close Binaries: Eclipsing Stars: Individual (Ir Cas)
摘要The first photometric analysis of IR Cas was carried out based on the new observed BVRI light curves. The symmetric light curves and nearly flat secondary minimum indicate that very precise photometric results can be determined. We found that IR Cas is a near contact binary with the primary component filling its Roche lobe. An analysis of the O - C diagram based on all available times of minimum light reveals evidence for a periodic change with a semi-amplitude of 0.0153 days and a period of 39.7 yr superimposed on a secular decrease at a rate of dp/dt = -1.28(+/- 0.09) x 10(-7) days yr(-1). The most reasonable explanation for the periodic change is the light time-travel effect due to a third body. The period decrease may be caused by mass transfer from the primary component to the secondary. With the decreasing period, IR Cas would eventually evolve into a contact system.
项目资助者National Natural Science Foundation of China(11203016,11333002,10778619,10778701,U1431105) ; Natural Science Foundation of Shandong Province(ZR2012AQ008) ; Open Research Program of Key Laboratory for the Structure and Evolution of Celestial Objects(OP201303)
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6256
URL查看原文
WOS记录号WOS:000344141200022
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]URSAE MAJORIS SYSTEMS ; LIGHT CURVES ; BO PEGASI ; STARS ; CASSIOPEIAE ; EVOLUTION ; PERIOD ; STAGE ; CYG
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9449
专题中国科学院天体结构与演化重点实验室
通讯作者Li, K (reprint author), Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Peoples R China.
作者单位1.Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai 264209, China (K.L.) (S.-M.H.) (D.-F.G.)
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
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Li, Kai,Hu, S. -M.,Guo, D. -F.,et al. THE FIRST PHOTOMETRIC ANALYSIS OF THE NEAR CONTACT BINARY IR Cas[J]. ASTRONOMICAL JOURNAL,2014,148(5).
APA Li, Kai.,Hu, S. -M..,Guo, D. -F..,Jiang, Y. -G..,Gao, D. -Y..,...&Li, K .(2014).THE FIRST PHOTOMETRIC ANALYSIS OF THE NEAR CONTACT BINARY IR Cas.ASTRONOMICAL JOURNAL,148(5).
MLA Li, Kai,et al."THE FIRST PHOTOMETRIC ANALYSIS OF THE NEAR CONTACT BINARY IR Cas".ASTRONOMICAL JOURNAL 148.5(2014).
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