CCD photometric study of a contact binary HH Ursae Majoris

	CCD photometric study of a contact binary HH Ursae Majoris
	Han QW(韩全旺)1,2,3 ; Li LF(李立芳)1,2 ; Kong XY(孔晓阳)1,2,3 ; Gong XB(龚小波)1,2,3 ; Zhao RJ(赵瑞娟)1,2,3
刊名	NEW ASTRONOMY
	2014-08
卷号	31 页码:26-31
关键词	Stars: binaries: close Stars: individuals: HH Ursae Majoris Stars: magnetic fields: spots
ISSN号	1384-1076
通讯作者	Han, QW (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	New complete BV light curves of a poorly investigated contact binary HH Ursae Majoris (HH UMa) are presented. The light curves are analyzed by using the 2003 version of the Wilson-Devinney (W-D) code. Combining with the radial velocity published by the previous investigators, we obtain the photometric solution of the system. The solution indicates that HH UMa is a W-type W UMa system with a mass ratio of q = m(2)/m(1) = 3.344 and a contact degree of 31.9%. The system has a very low inclination of i = 53.035 degrees and a temperature difference of 247 K between two components. The asymmetry of the light curves can be explained by adding a hot spot located near the neck region of the more massive component. A period investigation based on all available data shows that the period increases at a rate of dP/dt = 2.84 x 10(-7) days yr(-1), which can be explained by mass transfer from the less massive component to the more massive one. We also give the absolute parameters of the system. (C) 2014 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]	LIGHT CURVES ; STAR LIGHT ; VELOCITY ; SYSTEMS ; LEONIS
收录类别	SCI
原文出处	http://www.sciencedirect.com/science/article/pii/S1384107614000232
语种	英语
WOS记录号	WOS:000335629700005
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4575]
专题	云南天文台_大样本恒星演化研究组云南天文台_中国科学院天体结构与演化重点实验室
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, PR China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, PR China 3.University of Chinese Academy of Sciences, Beijing 100049, PR China
推荐引用方式 GB/T 7714	Han QW,Li LF,Kong XY,et al. CCD photometric study of a contact binary HH Ursae Majoris[J]. NEW ASTRONOMY,2014,31:26-31.
APA	Han QW,Li LF,Kong XY,Gong XB,&Zhao RJ.(2014).CCD photometric study of a contact binary HH Ursae Majoris.NEW ASTRONOMY,31,26-31.
MLA	Han QW,et al."CCD photometric study of a contact binary HH Ursae Majoris".NEW ASTRONOMY 31(2014):26-31.