DRIVING MECHANISM AND ONSET CONDITION OF A CONFINED ERUPTION

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 星系中的恒星形成研究团组

	DRIVING MECHANISM AND ONSET CONDITION OF A CONFINED ERUPTION
	Guo, Y.1,2,3; Ding, M. D.1,2; Schmieder, B.3; Li, H.4 ; Toeroek, T.3,5; Wiegelmann, T.6
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2010-12-10
卷号	725 期号:1 页码:L38-L42
关键词	Sun: corona Sun: filaments, prominences Sun: flares
ISSN号	2041-8205
产权排序	产权排序
合作状况	填入合作性质等
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.
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]	CORONAL MASS EJECTIONS ; UNSTABLE FLUX ROPES ; MAGNETIC-FIELD ; SOLAR-FLARES ; KINK ; PROMINENCES ; FILAMENT ; INSTABILITIES ; ACCELERATION ; SIGMOIDS
收录类别	SCI
资助信息	国科图
语种	英语
WOS记录号	WOS:000284575400009
公开日期	2011-11-23
内容类型	期刊论文
源URL	[http://159.226.72.40/handle/332002/1109]
专题	紫金山天文台_星系中的恒星形成研究团组
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
推荐引用方式 GB/T 7714	Guo, Y.,Ding, M. D.,Schmieder, B.,et al. DRIVING MECHANISM AND ONSET CONDITION OF A CONFINED ERUPTION[J]. ASTROPHYSICAL JOURNAL LETTERS,2010,725(1):L38-L42.
APA	Guo, Y.,Ding, M. D.,Schmieder, B.,Li, H.,Toeroek, T.,&Wiegelmann, T..(2010).DRIVING MECHANISM AND ONSET CONDITION OF A CONFINED ERUPTION.ASTROPHYSICAL JOURNAL LETTERS,725(1),L38-L42.
MLA	Guo, Y.,et al."DRIVING MECHANISM AND ONSET CONDITION OF A CONFINED ERUPTION".ASTROPHYSICAL JOURNAL LETTERS 725.1(2010):L38-L42.