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题名: HOOKED FLARE RIBBONS AND FLUX-ROPE-RELATED QSL FOOTPRINTS
作者: Zhao, Jie1; Gilchrist, Stuart A.2, 3; Aulanier, Guillaume2; Schmieder, Brigitte2; Pariat, Etienne2; Li Hui(黎辉)1
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2016-05-20
卷号: 823, 期号:1
关键词: Sun: chromosphere ; Sun: flares ; Sun: magnetic fields
DOI: 10.3847/0004-637X/823/1/62
文章类型: Article
英文摘要: We studied the magnetic topology of active region 12158 on 2014 September 10 and compared it with the observations before and early in the flare that begins at 17: 21 UT (SOL2014-09-10T17:45:00). Our results show that the sigmoidal structure and flare ribbons of this active region observed by the Solar Dynamics Observatory/Atmospheric Imaging Assembly can be well reproduced from a Grad-Rubin nonlinear force-free field extrapolation method. Various inverse-S-and inverse-J-shaped magnetic field lines, which surround a coronal flux rope, coincide with the sigmoid as observed in different extreme-ultraviolet wavelengths, including its multithreaded curved ends. Also, the observed distribution of surface currents in the magnetic polarity where it was not prescribed is well reproduced. This validates our numerical implementation and setup of the Grad-Rubin method. The modeled double inverse-J-shaped quasi-separatrix layer (QSL) footprints match the observed flare ribbons during the rising phase of the flare, including their hooked parts. The spiral-like shape of the latter may be related to a complex pre-eruptive flux rope with more than one turn of twist, as obtained in the model. These ribbon-associated flux-rope QSL footprints are consistent with the new standard flare model in 3D, with the presence of a hyperbolic flux tube located below an inverse-teardrop-shaped coronal QSL. This is a new step forward forecasting the locations of reconnection and ribbons in solar flares and the geometrical properties of eruptive flux ropes.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: SLIPPING MAGNETIC RECONNECTION ; SOLAR ERUPTION TOPOLOGIES ; DYNAMICS-OBSERVATORY SDO ; QUASI-SEPARATRIX LAYERS ; ACTIVE-REGION 10953 ; FORCE-FREE ; ELECTRIC-CURRENTS ; RUNNING RECONNECTION ; VECTOR MAGNETOGRAPH ; MASS EJECTION
收录类别: SCI
项目资助者: National Basic Research Program of China(2011CB811402) ; NSFC(11273065 ; Strategic Pioneer Program on Space Sciences, Chinese Academy of Sciences(XDA04076101) ; DIM ACAV ; Region Ile-de-France ; NASA Living With a Star program(NNX14AD42G) ; Solar Terrestrial program of the National Science Foundation(AGS-1127327) ; 11503089 ; 11522328 ; 11473070)
语种: 英语
WOS记录号: WOS:000377216300062
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16229
Appears in Collections:毫米波和亚毫米波技术实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Univ Paris 06, Univ Paris 04, Observ Paris,Sorbonne Paris Cite, PSL Res Univ,CNRS,LESIA,Univ Paris Diderot, 5 Pl Jules Janssen, F-92195 Meudon, France
3.NorthWest Res Associates, 3380 Mitchell Lane, Boulder, CO 80301 USA
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