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; 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NEW ASTRONOMY
2015-11
卷号41页码:17-21
DOI10.1016/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.
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Astronomy & Astrophysics
文章类型Article
ISSN1384-1076
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
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被引频次:3[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, 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
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, China
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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.,...&Li, K .(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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