YNAO OpenIR  > 中国科学院天体结构与演化重点实验室
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
Source PublicationNEW ASTRONOMY
2013-02
Volume19Pages:27-33
DOI10.1016/j.newast.2012.07.002
Indexed BySCI
KeywordStars Binary Close Binaries: Eclipsing Stars: Individuals (Ce Leo And V366 Cas)
Abstract

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.

Funding ProjectNational Natural Science Foundation of China[10778707] ; National Natural Science Foundation of China[11133007] ; Anhui Provincial Natural Science Foundation[1208085MA04] ; Key Laboratory for the Structure and Evolution of Celestial Objects[OP201110]
Funding OrganizationNational Natural Science Foundation of China[10778707, 11133007] ; Anhui Provincial Natural Science Foundation[1208085MA04] ; Key Laboratory for the Structure and Evolution of Celestial Objects[OP201110]
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:000310824600004
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordURSAE MAJORIS SYSTEMS ; PERIOD CHANGES ; LIGHT CURVES ; STAR LIGHT
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9413
Collection中国科学院天体结构与演化重点实验室
Corresponding AuthorYang, Y. -G.
Affiliation1.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
Recommended Citation
GB/T 7714
Yang, Y. -G.,Dai, H. -F.,Zhang, J. -F.. 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..(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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