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THE RELATION BETWEEN SOLAR ERUPTION TOPOLOGIES AND OBSERVED FLARE FEATURES. I. FLARE RIBBONS
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
2015-09-10
Source PublicationASTROPHYSICAL JOURNAL
Volume810Issue:2Pages:96
AbstractIn 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.
KeywordSun: Corona Sun: Coronal Mass Ejections (Cmes) Sun: Flares Sun: Magnetic Fields Sun: X-Rays, Gamma Rays
Subject Area天文和天体物理
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/810/2/96
WOS KeywordQUASI-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
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000362083700012
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/14901
Collection紫金山天文台青海观测站
Affiliation1.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
Recommended Citation
GB/T 7714
Savcheva, A.,Pariat, E.,McKillop, S.,et al. THE RELATION BETWEEN SOLAR ERUPTION TOPOLOGIES AND OBSERVED FLARE FEATURES. I. FLARE RIBBONS[J]. ASTROPHYSICAL JOURNAL,2015,810(2):96.
APA Savcheva, A..,Pariat, E..,McKillop, S..,McCauley, P..,Hanson, E..,...&DeLuca, E. E..(2015).THE RELATION BETWEEN SOLAR ERUPTION TOPOLOGIES AND OBSERVED FLARE FEATURES. I. FLARE RIBBONS.ASTROPHYSICAL JOURNAL,810(2),96.
MLA Savcheva, A.,et al."THE RELATION BETWEEN SOLAR ERUPTION TOPOLOGIES AND OBSERVED FLARE FEATURES. I. FLARE RIBBONS".ASTROPHYSICAL JOURNAL 810.2(2015):96.
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