New photometric studies of two contact binaries CE Leo and V366 Cas with possible tertiary companions

CORC > 云南天文台 > 中国科学院云南天文台 > 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
刊名	NEW ASTRONOMY
	2013-02
卷号	19 页码:27-33
关键词	Stars Binary Close Binaries: eclipsing Stars: individuals (CE Leo and V366 Cas)
ISSN号	1384-1076
通讯作者	Yang, YG (reprint author), Huaibei Normal Univ, Sch Phys & Elect Informat, Huaibei 235000, Anhui, Peoples R China.
英文摘要	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.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	URSAE MAJORIS SYSTEMS ; PERIOD CHANGES ; LIGHT CURVES ; STAR LIGHT
收录类别	SCI
原文出处	http://www.sciencedirect.com/science/article/pii/S1384107612000693
语种	英语
WOS记录号	WOS:000310824600004
公开日期	2016-06-01
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/9413]
专题	云南天文台_中国科学院天体结构与演化重点实验室
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
推荐引用方式 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.