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题名: THE RELATION BETWEEN SOLAR ERUPTION TOPOLOGIES AND OBSERVED FLARE FEATURES. II. DYNAMICAL EVOLUTION
作者: Savcheva, A.1; Pariat, E.2; McKillop, S.1; McCauley, P.1; Hanson, E.3; Su, Y.1, 4; DeLuca, E. E.1
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2016-01-20
卷号: 817, 期号:1
关键词: Sun: corona ; Sun: coronal mass ejections (CMEs) ; Sun: flares ; Sun: magnetic fields ; Sun: X-rays, gamma rays
DOI: 10.3847/0004-637X/817/1/43
文章类型: Article
英文摘要: A long-established goal of solar physics is to build understanding of solar eruptions and develop flare and coronal mass ejection (CME) forecasting models. In this paper, we continue our investigation of nonlinear forces free field (NLFFF) models by comparing topological properties of the solutions to the evolution of the flare ribbons. In particular, we show that data-constrained NLFFF models of three erupting sigmoid regions (SOL2010-04-08, SOL2010-08-07, and SOL2012-05-12) built to reproduce the active region magnetic field in the pre-flare state can be rendered unstable and the subsequent sequence of unstable solutions produces quasi-separatrix layers that match the flare ribbon evolution as observed by SDO/AIA. We begin with a best-fit equilibrium model for the pre-flare active region. We then add axial flux to the flux rope in the model to move it across the stability boundary. At this point, the magnetofrictional code no longer converges to an equilibrium solution. The flux rope rises as the solutions are iterated. We interpret the sequence of magnetofrictional steps as an evolution of the active region as the flare/CME begins. The magnetic field solutions at different steps are compared with the flare ribbons. The results are fully consistent with the three-dimensional extension of the standard flare/CME model. Our ability to capture essential topological features of flaring active regions with a non-dynamic magnetofrictional code strongly suggests that the pre-flare, large-scale topological structures are preserved as the flux rope becomes unstable and lifts off.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: 3-DIMENSIONAL MAGNETIC RECONNECTION ; SLIP-RUNNING RECONNECTION ; QUASI-SEPARATRIX LAYERS ; POLAR CROWN PROMINENCE ; X-RAY TELESCOPE ; 2010 APRIL 8 ; ACTIVE-REGION ; FLUX-ROPE ; ELECTRIC-CURRENTS ; 2-RIBBON FLARES
收录类别: SCI
项目资助者: ESA, NSC (Norway) ; NASA(NNM07AB07C) ; NASA LWS Jack Eddy postdoctoral fellowship ; NSFC(11333009) ; Youth Fund of Jiang Su(BK20141043) ; NAOJ (UK) ; NASA (UK) ; STFC (UK)
语种: 英语
WOS记录号: WOS:000368872400043
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16130
Appears in Collections:太阳高能及相关物理过程研究团组_期刊论文

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作者单位: 1.Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
2.Univ Paris Diderot, CNRS, UPMC, LESIA,Observ Paris,PSL Res Univ, F-92190 Meudon, France
3.Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
4.Chinese Acad Sci, Key Lab Dark Matter & Space Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
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