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题名: THE RELATION BETWEEN SOLAR ERUPTION TOPOLOGIES AND OBSERVED FLARE FEATURES. I. FLARE RIBBONS
作者: Savcheva, A.1; Pariat, E.2; McKillop, S.1; McCauley, P.1; Hanson, E.3; Su, Y.1, 4; Werner, E.5; DeLuca, E. E.1
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2015-09-10
卷号: 810, 期号:2, 页码:96
关键词: Sun: corona ; Sun: coronal mass ejections (CMEs) ; Sun: flares ; Sun: magnetic fields ; Sun: X-rays, gamma rays
学科分类: 天文和天体物理
DOI: 10.1088/0004-637X/810/2/96
文章类型: Article
英文摘要: In this paper we present a topological magnetic field investigation of seven two-ribbon flares in sigmoidal active regions observed with Hinode, STEREO, and Solar Dynamics Observatory. We first derive the 3D coronal magnetic field structure of all regions using marginally unstable 3D coronal magnetic field models created with the flux rope insertion method. The unstable models have been shown to be a good model of the flaring magnetic field configurations. Regions are selected based on their pre-flare configurations along with the appearance and observational coverage of flare ribbons, and the model is constrained using pre-flare features observed in extreme ultraviolet and X-ray passbands. We perform a topology analysis of the models by computing the squashing factor, Q, in order to determine the locations of prominent quasi-separatrix layers (QSLs). QSLs from these maps are compared to flare ribbons at their full extents. We show that in all cases the straight segments of the two J-shaped ribbons are matched very well by the flux-rope-related QSLs, and the matches to the hooked segments are less consistent but still good for most cases. In addition, we show that these QSLs overlay ridges in the electric current density maps. This study is the largest sample of regions with QSLs derived from 3D coronal magnetic field models, and it shows that the magnetofrictional modeling technique that we employ gives a very good representation of flaring regions, with the power to predict flare ribbon locations in the event of a flare following the time of the model.
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 ; 3-DIMENSIONAL MAGNETIC RECONNECTION ; SLIP-RUNNING RECONNECTION ; ENERGY-RELEASE RATE ; BASTILLE-DAY FLARE ; 2011 FEBRUARY 15 ; FLUX-ROPE ; 2-RIBBON FLARES ; NULL POINTS ; X-RAY
收录类别: SCI
所属项目名称: PMO_LIB-IR
语种: 英语
WOS记录号: WOS:000362083700012
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/14901
Appears in Collections:紫金山天文台青海观测站_期刊论文

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作者单位: 1.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
2.Univ Paris Diderot, UPMC, CNRS, LESIA,Observ Paris, F-92190 Meudon, France
3.Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
4.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Sci, Nanjing 210008, Jiangsu, Peoples R China
5.Uppsala Univ, Dept Phys & Astron, SE-75120 Uppsala, Sweden
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