QZ Aurigae: An eclipsing cataclysmic variable with a white dwarf of almost equivalent mass to its companion

	QZ Aurigae: An eclipsing cataclysmic variable with a white dwarf of almost equivalent mass to its companion
	Shi G(时光)1,2,3 ; Qian SB(钱声帮)1,2,3
刊名	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
	2014-04
卷号	66 期号:2 页码:1-4
关键词	binaries: close binaries: eclipsing novae: cataclysmic variables stars: individual (QZ Aurigae)
ISSN号	0004-6264
通讯作者	Shi, G (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	We present CCD photometric monitoring of the classic nova QZ Aurigae (Nova Aur 1964) since 2008 with the 2.4-m telescope at Lijiang station of Yunnan Astronomical Observatory in China, as well as the 2.16-m telescope and the 85-cm telescope at Xionglong station of the National Astronomical Observatory in China. By utilizing eight new eclipse timings and the data from the last literature, published almost 20 years ago, we construct the O - C diagram of this system to analyze the orbital period variation. We find no evidence of long-term orbital period variations in QZ Aur. Moreover, the light curves showing the main eclipse process of the white dwarf suggest the presence of a bright spot component and a disk, as commonly found in nova-like variables. This may reveal high mass accretion and high mass transfer in this system. However, even high mass transfer rates from the donor are inconsistent with our result of no period variations, unless the mass ratio is almost equal to 1. Hence, the observed results here possibly support that the mass of the primary white dwarf is extremely close to that of the donor star in the eclipsing binary QZ Aur.
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]	MAGNETIC BRAKING ; AC-CANCRI
收录类别	SCI
原文出处	http://pasj.oxfordjournals.org/content/66/2/41
语种	英语
WOS记录号	WOS:000339427200005
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5903]
专题	云南天文台_双星与变星研究组云南天文台_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, P. O. Box 110, 650011 Kunming, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China 3.University of the Chinese Academy of Sciences, Beijing 100049, China
推荐引用方式 GB/T 7714	Shi G,Qian SB. QZ Aurigae: An eclipsing cataclysmic variable with a white dwarf of almost equivalent mass to its companion[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2014,66(2):1-4.
APA	Shi G,&Qian SB.(2014).QZ Aurigae: An eclipsing cataclysmic variable with a white dwarf of almost equivalent mass to its companion.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,66(2),1-4.
MLA	Shi G,et al."QZ Aurigae: An eclipsing cataclysmic variable with a white dwarf of almost equivalent mass to its companion".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 66.2(2014):1-4.