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MAGNETOHYDRODYNAMIC MODELING OF THE SOLAR ERUPTION ON 2010 APRIL 8
Bernhard Kliem1,2,3,4; Su, YN5; van Ballegooijen, AA5; DeLuca, EE5; Bernhard Kliem (reprint author), Univ Potsdam, Inst Phys & Astron, D-14476 Potsdam, Germany.
发表期刊ASTROPHYSICAL JOURNAL
2013-12-20
卷号779期号:2
DOI10.1088/0004-637X/779/2/129
产权排序第3完成单位
收录类别SCI
关键词Magnetohydrodynamics (Mhd) Sun: Corona Sun: Coronal Mass Ejections (Cmes) Sun: Flares Sun: Filaments Sun: Magnetic Fields Prominences
摘要The structure of the coronal magnetic field prior to eruptive processes and the conditions for the onset of eruption are important issues that can be addressed through studying the magnetohydrodynamic (MHD) stability and evolution of nonlinear force-free field (NLFFF) models. This paper uses data-constrained NLFFF models of a solar active region (AR) that erupted on 2010 April 8 as initial conditions in MHD simulations. These models, constructed with the techniques of flux rope insertion and magnetofrictional relaxation (MFR), include a stable, an approximately marginally stable, and an unstable configuration. The simulations confirm previous related results of MFR runs, particularly that stable flux rope equilibria represent key features of the observed pre-eruption coronal structure very well, and that there is a limiting value of the axial flux in the rope for the existence of stable NLFFF equilibria. The specific limiting value is located within a tighter range, due to the sharper discrimination between stability and instability by the MHD description. The MHD treatment of the eruptive configuration yields a very good agreement with a number of observed features, like the strongly inclined initial rise path and the close temporal association between the coronal mass ejection and the onset of flare reconnection. Minor differences occur in the velocity of flare ribbon expansion and in the further evolution of the inclination; these can be eliminated through refined simulations. We suggest that the slingshot effect of horizontally bent flux in the source region of eruptions can contribute significantly to the inclination of the rise direction. Finally, we demonstrate that the onset criterion, formulated in terms of a threshold value for the axial flux in the rope, corresponds very well to the threshold of the torus instability in the considered AR.
项目资助者DFG ; STFC ; NSF [AGS-1249270] ; Chinese Academy of Sciences [2012T1J0017] ; NASA [NNM07AB07C] ; LMSAL [SP02H1701R]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
URL查看原文
WOS记录号WOS:000328187200039
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]CORONAL MASS EJECTIONS ; ACTIVE-REGION 10953 ; POLAR-CROWN PROMINENCE ; HYPERBOLIC FLUX TUBES ; MAGNETIC-FIELD ; ROPE ERUPTION ; FILAMENT ; SUN ; FLARE ; EXTRAPOLATION
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6216
专题太阳物理研究组
通讯作者Bernhard Kliem (reprint author), Univ Potsdam, Inst Phys & Astron, D-14476 Potsdam, Germany.
作者单位1.Institute of Physics and Astronomy, University of Potsdam, D-14476 Potsdam, Germany
2.Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey RH5 6NT, UK
3.Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, China
4.College of Science, George Mason University, Fairfax, VA 22030, USA
5.Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA
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Bernhard Kliem,Su, YN,van Ballegooijen, AA,et al. MAGNETOHYDRODYNAMIC MODELING OF THE SOLAR ERUPTION ON 2010 APRIL 8[J]. ASTROPHYSICAL JOURNAL,2013,779(2).
APA Bernhard Kliem,Su, YN,van Ballegooijen, AA,DeLuca, EE,&Bernhard Kliem .(2013).MAGNETOHYDRODYNAMIC MODELING OF THE SOLAR ERUPTION ON 2010 APRIL 8.ASTROPHYSICAL JOURNAL,779(2).
MLA Bernhard Kliem,et al."MAGNETOHYDRODYNAMIC MODELING OF THE SOLAR ERUPTION ON 2010 APRIL 8".ASTROPHYSICAL JOURNAL 779.2(2013).
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