Photometry and spectroscopy of KS Ursae Majoris during superoutburst
文献类型：期刊论文
| 作者 | Zhao, YH1 ; Li, ZY1; Wu, XA1; Peng, QH1; Zhang ZS(张周生)2; Li ZL(李自力)2
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| 刊名 | ASTRONOMICAL JOURNAL
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| 出版日期 | 2006-03 |
| 卷号 | 131期号:3页码:1667-1673 |
| 关键词 | accretion accretion disks binaries : close novae, cataclysmic variables stars : dwarf novae stars : individual (KS Ursae Majoris) |
| ISSN号 | 0004-6256 |
| 产权排序 | 第二完成单位 |
| 通讯作者 | Zhao, YH (reprint author), Nanjing Univ, Dept Astron, 22 Hankou Lu Nanjing, Nanjing 210093, Peoples R China. |
| 英文摘要 | 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. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | ACCRETION-DISK PRECESSION ; NOVA OY CARINAE ; SU-UMA STARS ; DWARF NOVAE ; CATACLYSMIC VARIABLES ; SIMULATIONS ; SUPERHUMPS ; BINARIES ; MODEL |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/1538-3881/131/3/1667/ |
| 语种 | 英语 |
| WOS记录号 | WOS:000236143700035 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4206]  |
| 专题 | 云南天文台_其他 |
| 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,&Li ZL.(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. |
入库方式： OAI收割
来源：云南天文台
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