Four color light curves and period changes investigation of the contact binary BX Peg

doi:10.1016/j.newast.2015.04.010

	Four color light curves and period changes investigation of the contact binary BX Peg
	Li, Kai1,2 ; Hu, Shaoming 1; Guo, Difu 1; Jiang, Yunguo 1; Gao, Dongyang 1; Chen, Xu 1
发表期刊	NEW ASTRONOMY
	2015-11
卷号	41 页码:17-21
DOI	10.1016/j.newast.2015.04.010
收录类别	SCI
关键词	Stars: Binaries: Close Stars: Binaries: Eclipsing Stars: Individual (Bx Peg)
摘要	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.
资助项目	National 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]
项目资助者	National 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]
语种	英语
学科领域	天文学 ; 恒星与银河系 ; 恒星天文学 ; 恒星形成与演化
文章类型	Article
出版者	ELSEVIER SCIENCE BV
出版地	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
ISSN	1384-1076
URL	查看原文
WOS记录号	WOS:000368045200004
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	SYSTEM
引用统计	被引频次：16[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/9398
专题	中国科学院天体结构与演化重点实验室
通讯作者	Li, Kai
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 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, China
推荐引用方式 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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