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题名: DRIVING MECHANISM AND ONSET CONDITION OF A CONFINED ERUPTION
作者: Guo, Y.1, 2, 3; Ding, M. D.1, 2; Schmieder, B.3; Li Hui(黎辉)4; Toeroek, T.3, 5; Wiegelmann, T.6
刊名: ASTROPHYSICAL JOURNAL LETTERS
出版日期: 2010-12-10
卷号: 725, 期号:1, 页码:L38-L42
关键词: Sun: corona ; Sun: filaments, prominences ; Sun: flares
学科分类: Astronomy & Astrophysics
DOI: 10.1088/2041-8205/725/1/L38
文章类型: Article
中文摘要: 摘要description
英文摘要: We study a confined eruption accompanied by an M1.1 flare in solar active region (AR) NOAA 10767 on 2005 May 27, where a pre-eruptive magnetic flux rope was reported in a nonlinear force-free field (NLFFF) extrapolation. The observations show a strong writhing motion of the erupting structure, suggesting that a flux rope was indeed present and converted some of its twist into writhe in the course of the eruption. Using the NLFFF extrapolation, we calculate the twist of the pre-eruptive flux rope and find that it is in very good agreement with thresholds of the helical kink instability found in numerical simulations. We conclude that the activation and rise of the flux rope were triggered and driven by the instability. Using a potential field extrapolation, we also estimate the height distribution of the decay index of the external magnetic field in the AR 1 hr prior to the eruption. We find that the decay index stays below the threshold for the torus instability for a significant height range above the erupting flux rope. This provides a possible explanation for the confinement of the eruption to the low corona.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: CORONAL MASS EJECTIONS ; UNSTABLE FLUX ROPES ; MAGNETIC-FIELD ; SOLAR-FLARES ; KINK ; PROMINENCES ; FILAMENT ; INSTABILITIES ; ACCELERATION ; SIGMOIDS
收录类别: SCI
语种: 英语
WOS记录号: WOS:000284575400009
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/1109
Appears in Collections:星系中的恒星形成研究团组_期刊论文

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作者单位: 1.Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China
2.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Peoples R China
3.Univ Paris Diderot, UPMC, CNRS, LESIA,Observ Paris, F-92190 Meudon, France
4.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China
5.Predict Sci Inc, San Diego, CA 92121 USA
6.Max Planck Inst Sonnensyst Forsch, D-37191 Katlenburg Lindau, Germany

Recommended Citation:
Y. Guo, M. D. Ding, Schmieder, H. Li, T. T¨or¨ok, and T. Wiegelmann.DRIVING MECHANISM AND ONSET CONDITION OF A CONFINED ERUPTION ,The Astrophysical Journal Letters,2010,725(1):L38-42
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文件名: 2010002DRIVING MECHANISM AND ONSET CONDITION OF A CONFINED ERUPTION.pdf
格式: Adobe PDF
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