Photometry and spectroscopy of KS Ursae Majoris during superoutburst

doi:10.1086/499920

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	Photometry and spectroscopy of KS Ursae Majoris during superoutburst
	Zhao, YH1 ; Li, ZY 1; Wu, XA 1; Peng, QH 1; Zhang ZS(张周生)2 ; Li ZL(李自力)2 ; Zhao, YH (reprint author), Nanjing Univ, Dept Astron, 22 Hankou Lu Nanjing, Nanjing 210093, Peoples R China.
发表期刊	ASTRONOMICAL JOURNAL
	2006-03
卷号	131 期号:3 页码:1667-1673
DOI	10.1086/499920
产权排序	第2完成单位
收录类别	SCI
关键词	Accretion Accretion Disks Binaries : Close Stars : Dwarf Novae Novae Stars : Individual (Ks Ursae Majoris) Cataclysmic Variables
摘要	We report photometric and spectroscopic observations of the SU UMa - type dwarf nova KS Ursae Majoris during its 2003 February superoutburst. Modulations with a period of 0. 07017 +/- 0. 00021 days, which is 3.3% larger than the orbital period, have been found during the superoutburst and may be positive superhumps. A maximum trough- to-peak amplitude of around 0.3 mag is determined for this superhump. The spectra show broad absorption- line profiles. The lines display blue and red troughs that alternate in depth. The radial velocity curve of the absorption wings of H beta has an amplitude of 40 +/- 11 km s (-1) and a phase offset of 0. 12 +/- 0. 03. The gamma- velocity of the binary is 3 +/- 9 km s (-1) and varies on the order of 50 km s (-1) from day to day. From other clear evidence for a precessing eccentric disk, we obtain a solution to an eccentric outer disk consistent with theoretical works, which demonstrates the validity of the relation between superhumps and tidal effects. The inner part of the disk is also eccentric, as evidenced by asymmetric and symmetric wings in the lines. Therefore, the whole disk is eccentric, and the variation of the gamma- velocity and the evolutionary asymmetric line profiles could be criteria for a precessing eccentric accretion disk.
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	0004-6256
URL	查看原文
WOS记录号	WOS:000236143700035
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	ACCRETION-DISK PRECESSION ; NOVA OY CARINAE ; SU-UMA STARS ; DWARF NOVAE ; CATACLYSMIC VARIABLES ; SIMULATIONS ; SUPERHUMPS ; BINARIES ; MODEL
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/4206
专题	其他
通讯作者	Zhao, YH (reprint author), Nanjing Univ, Dept Astron, 22 Hankou Lu Nanjing, Nanjing 210093, Peoples R China.
作者单位	1.Department of Astronomy, Nanjing University, 22 Hankou Lu Nanjing 210093, China 2.Yunnan Observatory, Kunming 650011, China
推荐引用方式 GB/T 7714	Zhao, YH,Li, ZY,Wu, XA,et al. Photometry and spectroscopy of KS Ursae Majoris during superoutburst[J]. ASTRONOMICAL JOURNAL,2006,131(3):1667-1673.
APA	Zhao, YH.,Li, ZY.,Wu, XA.,Peng, QH.,Zhang ZS.,...&Zhao, YH .(2006).Photometry and spectroscopy of KS Ursae Majoris during superoutburst.ASTRONOMICAL JOURNAL,131(3),1667-1673.
MLA	Zhao, YH,et al."Photometry and spectroscopy of KS Ursae Majoris during superoutburst".ASTRONOMICAL JOURNAL 131.3(2006):1667-1673.

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