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Four color light curves and period changes investigation of the contact binary BX Peg
Li, Kai1,2; Hu, Shaoming1; Guo, Difu1; Jiang, Yunguo1; Gao, Dongyang1; Chen, Xu1
Source PublicationNEW ASTRONOMY
2015-11
Volume41Pages:17-21
DOI10.1016/j.newast.2015.04.010
Indexed BySCI
KeywordStars: Binaries: Close Stars: Binaries: Eclipsing Stars: Individual (Bx Peg)
Abstract

We presented BVRcIc light curves of BX Peg obtained by the Weihai Observatory 1.0-m telescope of Shandong University. The W-D code was used to analyze the four color light curves, it is shown that BX Peg is a W-subtype shallow contact binary with a fill-out factor of f = 14.6%. The asymmetric light curves were explained by a dark spot on the less massive hot component. A total of 328 times of minimum light were used to study the orbital period variation of BX Peg. We found that the orbital period of BX Peg was continuous decrease with a rate of dp/dt = -2.07 x 10(-7) d yr(-1) superimposed on a cyclic oscillation with a period of 57.8 yr. The secular period decrease should be caused by the angular momentum loss via magnetic stellar wind. The cyclic modulation is very likely to be produced by the light travel time effect due to a tertiary companion. (C) 2015 Elsevier B.V. All rights reserved.

Funding ProjectNational Natural Science Foundation of China[11203016] ; National Natural Science Foundation of China[11333002] ; National Natural Science Foundation of China[107786191] ; National Natural Science Foundation of China[0778701] ; National Natural Science Foundation of China[U1431105] ; Natural Science Foundation of Shandong Province[ZR2012AQ008] ; Natural Science Foundation of Shandong Province[ZR2014AQ019] ; Open Research Program of Key Laboratory for the Structure and Evolution of Celestial Objects[OP201303]
Funding OrganizationNational Natural Science Foundation of China[11203016, 11333002 , 107786191, 0778701, U1431105] ; Natural Science Foundation of Shandong Province[ZR2012AQ008, ZR2014AQ019] ; Open Research Program of Key Laboratory for the Structure and Evolution of Celestial Objects[OP201303]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星天文学 ; 恒星形成与演化
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherELSEVIER SCIENCE BV
Publication PlacePO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
ISSN1384-1076
URL查看原文
WOS IDWOS:000368045200004
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSYSTEM
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9398
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
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, China
Recommended Citation
GB/T 7714
Li, Kai,Hu, Shaoming,Guo, Difu,et al. Four color light curves and period changes investigation of the contact binary BX Peg[J]. NEW ASTRONOMY,2015,41:17-21.
APA Li, Kai,Hu, Shaoming,Guo, Difu,Jiang, Yunguo,Gao, Dongyang,&Chen, Xu.(2015).Four color light curves and period changes investigation of the contact binary BX Peg.NEW ASTRONOMY,41,17-21.
MLA Li, Kai,et al."Four color light curves and period changes investigation of the contact binary BX Peg".NEW ASTRONOMY 41(2015):17-21.
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