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Magnetic reconnection during eruptive magnetic flux ropes
Mei ZX(梅志星)1,2; Keppens, R.1; Roussev, I.I.1,3; Lin J(林隽)2,4
Source PublicationASTRONOMY & ASTROPHYSICS
2017-08-01
Volume604
DOI10.1051/0004-6361/201731146
Contribution Rank第2完成单位
Indexed BySCI ; EI
KeywordMagnetic Reconnection Sun: Flares Sun: Coronal Mass Ejections (Cmes) Magnetohydrodynamics (Mhd) Instabilities
Abstract

Aims. We perform a three-dimensional (3D) high resolution numerical simulation in isothermal magnetohydrodynamics to study the magnetic reconnection process in a current sheet (CS) formed during an eruption of a twisted magnetic flux rope (MFR). Because the twist distribution violates the Kruskal-Shafranov condition, the kink instability occurs, and the MFR is distorted. The centre part of the MFR loses its equilibrium and erupts upward, which leads to the formation of a 3D CS underneath it. 

Methods. In order to study the magnetic reconnection inside the CS in detail, mesh refinement has been used to reduce the numerical di ff usion and we estimate a Lundquist number S = 10(4) in the vicinity of the CS. 

Results. The refined mesh allows us to resolve fine structures inside the 3D CS: a bifurcating sheet structure signaling the 3D generalization of Petschek slow shocks, some distorted-cylindrical substructures due to the tearing mode instabilities, and two turbulence regions near the upper and the lower tips of the CS. The topological characteristics of the MFR depend sensitively on the observer's viewing angle: it presents as a sigmoid structure, an outwardly expanding MFR with helical distortion, or a flare-CS-coronal mass ejection symbiosis as in 2D flux-rope models when observed from the top, the front, or the side.

Funding ProjectBelgian Science Policy Office ; Interuniversity Attraction Poles Programme ; Belgian Science Policy Office, IAP[P7/08 CHARM] ; KU Leuven[GOA/2015-014] ; Program 973[2013CBA01503] ; NSFC[11303088] ; NSFC[11573064] ; NSFC-CAS[U1631130] ; CAS[QYZDJ-SSW-SH012] ; Hercules foundation ; Flemish government
Funding OrganizationBelgian Science Policy Office ; Interuniversity Attraction Poles Programme ; Belgian Science Policy Office, IAP[P7/08 CHARM] ; KU Leuven[GOA/2015-014] ; Program 973[2013CBA01503] ; NSFC[11303088, 11573064] ; NSFC-CAS[U1631130] ; CAS[QYZDJ-SSW-SH012] ; Hercules foundation ; Flemish government
Language英语
Subject Area天文学 ; 太阳与太阳系 ; 太阳物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherEDP SCIENCES S A
Publication Place17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE
ISSN0004-6361
URL查看原文
WOS IDWOS:000408480100135
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordPLASMOID-INDUCED-RECONNECTION ; SOLAR-FLARES ; CORONAL LOOPS ; EJECTION ; EQUILIBRIUM ; INSTABILITY ; EVOLUTION ; MODELS
EI Accession Number20173304049728
EI KeywordsMagnetohydrodynamics
EI Classification Number615.3Magnetohydrodynamics (MHD) Power Generation - 701.2Magnetism: Basic Concepts and Phenomena - 723.5Computer Applications
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/10165
Collection太阳物理研究组
Corresponding AuthorMei ZX(梅志星)
Affiliation1.Centre for Mathematical Plasma Astrophysics, Department of Mathematics, KU Leuven, Leuven, Celestijnenlaan 200B, 3001, Belgium
2.Yunnan Observatories, Chinese Academy of Sciences, Kunming, Yunnan, China
3.Division of Atmospheric and Geospace Sciences, National Science Foundation, Arlington; VA, United States
4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Chaoyang District, Beijing, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Mei ZX,Keppens, R.,Roussev, I.I.,et al. Magnetic reconnection during eruptive magnetic flux ropes[J]. ASTRONOMY & ASTROPHYSICS,2017,604.
APA Mei ZX,Keppens, R.,Roussev, I.I.,&Lin J.(2017).Magnetic reconnection during eruptive magnetic flux ropes.ASTRONOMY & ASTROPHYSICS,604.
MLA Mei ZX,et al."Magnetic reconnection during eruptive magnetic flux ropes".ASTRONOMY & ASTROPHYSICS 604(2017).
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