New photometric studies of two contact binaries CE Leo and V366 Cas with possible tertiary companions
Yang, Y. -G.1,2; Dai, H. -F.1; Zhang, J. -F.1; Yang, YG (reprint author), Huaibei Normal Univ, Sch Phys & Elect Informat, Huaibei 235000, Anhui, Peoples R China.
发表期刊NEW ASTRONOMY
2013-02
卷号19页码:27-33
DOI10.1016/j.newast.2012.07.002
收录类别SCI
关键词Stars Binary Close Binaries: Eclipsing Stars: Individuals (Ce Leo And V366 Cas)
摘要We present new photometry for CE Leo and V366 Cas, performed using three small telescopes in China from 2008 December to 2012 March. Using the updated Wilson-Devinney program, the photometric solutions of two binaries were deduced from new BVR light curves. Their photometric mass ratios and geometric fill-out factors are q = 0.533(+/- 0.002) and f = 15.8%(+/- 0.3%) for CE Leo, q = 0.887(+/- 0.007) and f = 38.7%(+/- 1.0%) for V366 Cas, respectively. By analyzing the O-C curves, it is found that their orbital periods show a long-time increase with a light-time orbit due to a third body. The periods of the tertiary components are P-3 = 39.7(+/- 0.9) yr for CE Leo and P-3 = 16.7(+/- 0.4) yr for V366 Cas, respectively. With the existence of addition companion, those two binaries appear to be triple systems. The period increase rates are dP/dt = 1.63(+/- 0.05) x 10(-7) d yr(-1) for CE Leo and dP/dt = +5.55(+/- 0.03) x 10(-7) d yr(-1) for V366 Cas, respectively. This kind of period increase may be interpreted by the conservative mass transfer from the secondary component to the primary one. With periods increasing, CE Leo and V366 Cas will evolve into broken-contact configurations as predicted by the thermal relaxation oscillation theory. (C) 2012 Elsevier B.V. All rights reserved.
项目资助者National Natural Science Foundation of China(10778707,11133007) ; Anhui Provincial Natural Science Foundation(1208085MA04) ; Key Laboratory for the Structure and Evolution of Celestial Objects(OP201110)
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:000310824600004
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]URSAE MAJORIS SYSTEMS ; PERIOD CHANGES ; LIGHT CURVES ; STAR LIGHT
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9413
专题中国科学院天体结构与演化重点实验室
通讯作者Yang, YG (reprint author), Huaibei Normal Univ, Sch Phys & Elect Informat, Huaibei 235000, Anhui, Peoples R China.
作者单位1.School of Physics and Electronic Information, Huaibei Normal University, 235000 Huaibei, Anhui Province, China
2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650011 Kunming, China
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Yang, Y. -G.,Dai, H. -F.,Zhang, J. -F.,et al. New photometric studies of two contact binaries CE Leo and V366 Cas with possible tertiary companions[J]. NEW ASTRONOMY,2013,19:27-33.
APA Yang, Y. -G.,Dai, H. -F.,Zhang, J. -F.,&Yang, YG .(2013).New photometric studies of two contact binaries CE Leo and V366 Cas with possible tertiary companions.NEW ASTRONOMY,19,27-33.
MLA Yang, Y. -G.,et al."New photometric studies of two contact binaries CE Leo and V366 Cas with possible tertiary companions".NEW ASTRONOMY 19(2013):27-33.
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