EVOLUTION OF HARD X-RAY SOURCES AND ULTRAVIOLET SOLAR FLARE RIBBONS FOR A CONFINED ERUPTION OF A MAGNETIC FLUX ROPE

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	EVOLUTION OF HARD X-RAY SOURCES AND ULTRAVIOLET SOLAR FLARE RIBBONS FOR A CONFINED ERUPTION OF A MAGNETIC FLUX ROPE
	Guo, Y.1,2; Ding, M. D.1,2; Schmieder, B.3; Demoulin, P.3; Li, H.4
刊名	ASTROPHYSICAL JOURNAL
	2012-02-10
卷号	746 期号:1 页码:17(11pp)
关键词	Sun: flares Sun: magnetic topology Sun: UV radiation Sun: X-rays, gamma rays
ISSN号	0004-637X
英文摘要	We study the magnetic field structures of hard X-ray (HXR) sources and flare ribbons of the M1.1 flare in active region NOAA 10767 on 2005 May 27. We have found in a nonlinear force-free field extrapolation over the same polarity inversion line, a small pre-eruptive magnetic flux rope located next to sheared magnetic arcades. RHESSI and the Transition Region and Coronal Explorer (TRACE) observed this confined flare in the X-ray bands and ultraviolet (UV) 1600 angstrom bands, respectively. In this event magnetic reconnection occurred at several locations. It first started at the location of the pre-eruptive flux rope. Then, the observations indicate that magnetic reconnection occurred between the pre-eruptive magnetic flux rope and the sheared magnetic arcades more than 10 minutes before the flare peak. This implies the formation of the larger flux rope, as observed with TRACE. Next, HXR sources appeared at the footpoints of this larger flux rope at the peak of the flare. The associated high-energy particles may have been accelerated below the flux rope in or around a reconnection region. Still, the close spatial association between the HXR sources and the flux rope footpoints favors an acceleration within the flux rope. Finally, a topological analysis of a large solar region, including active regions NOAA 10766 and 10767, shows the existence of large-scale Quasi-Separatrix Layers (QSLs) before the eruption of the flux rope. No enhanced emission was found at these QSLs during the flare, but the UV flare ribbons stopped at the border of the closest large-scale QSL.
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]	QUASI-SEPARATRIX LAYERS ; CORONAL MASS EJECTIONS ; ENERGY-RELEASE RATES ; ACTIVE-REGION ; KINK INSTABILITY ; RECONNECTION ; MODEL ; LOOP ; EQUILIBRIUM ; INITIATION
收录类别	SCI
语种	英语
WOS记录号	WOS:000302861300017
公开日期	2013-01-31
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/8036]
专题	紫金山天文台_太阳高能及相关物理过程研究团组
作者单位	1.Nanjing Univ, Dept Astron, Nanjing 210093, Jiangsu, Peoples R China 2.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Jiangsu, Peoples R China 3.Univ Paris Diderot, UPMC, Observ Paris, LESIA, F-92190 Meudon, France 4.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Guo, Y.,Ding, M. D.,Schmieder, B.,et al. EVOLUTION OF HARD X-RAY SOURCES AND ULTRAVIOLET SOLAR FLARE RIBBONS FOR A CONFINED ERUPTION OF A MAGNETIC FLUX ROPE[J]. ASTROPHYSICAL JOURNAL,2012,746(1):17(11pp).
APA	Guo, Y.,Ding, M. D.,Schmieder, B.,Demoulin, P.,&Li, H..(2012).EVOLUTION OF HARD X-RAY SOURCES AND ULTRAVIOLET SOLAR FLARE RIBBONS FOR A CONFINED ERUPTION OF A MAGNETIC FLUX ROPE.ASTROPHYSICAL JOURNAL,746(1),17(11pp).
MLA	Guo, Y.,et al."EVOLUTION OF HARD X-RAY SOURCES AND ULTRAVIOLET SOLAR FLARE RIBBONS FOR A CONFINED ERUPTION OF A MAGNETIC FLUX ROPE".ASTROPHYSICAL JOURNAL 746.1(2012):17(11pp).