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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
Source PublicationASTRONOMICAL JOURNAL
2014-11
Volume148Issue:5
DOI10.1088/0004-6256/148/5/96
Indexed BySCI
KeywordBinaries: Close Binaries: Eclipsing Stars: Individual (Ir Cas)
Abstract

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.

Funding ProjectNational Natural Science Foundation of China[11203016] ; National Natural Science Foundation of China[11333002] ; National Natural Science Foundation of China[10778619] ; National Natural Science Foundation of China[10778701] ; National Natural Science Foundation of China[U1431105] ; Natural Science Foundation of Shandong Province[ZR2012AQ008] ; Open Research Program of Key Laboratory for the Structure and Evolution of Celestial Objects[OP201303]
Funding OrganizationNational 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]
Language英语
Subject Area天文学 ; 天体物理学 ; 实测天体物理学 ; 恒星与银河系 ; 恒星天文学
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
WOS IDWOS:000344141200022
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordURSAE MAJORIS SYSTEMS ; LIGHT CURVES ; BO PEGASI ; STARS ; CASSIOPEIAE ; EVOLUTION ; PERIOD ; STAGE ; CYG
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9449
Collection中国科学院天体结构与演化重点实验室
Corresponding AuthorLi, Kai
Affiliation1.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
Recommended Citation
GB/T 7714
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.,&Chen, X..(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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