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ASYMMETRIC MAGNETIC RECONNECTION IN SOLAR FLARE AND CORONAL MASS EJECTION CURRENT SHEETS
Murphy, NA1; Miralles, MP1; Pope, CL1,2; Raymond, JC1; Winter, HD1; Reeves, KK1; Seaton, DB3; van Ballegooijen, AA1; Lin J(林隽)1,4
Source PublicationASTROPHYSICAL JOURNAL
2012-05-20
Volume751Issue:1
DOI10.1088/0004-637X/751/1/56
Contribution Rank第4完成单位
Indexed BySCI
KeywordMagnetic Reconnection Methods: Numerical Sun: Coronal Mass Ejections (Cmes) Sun: Flares
Abstract

We present two-dimensional resistive magnetohydrodynamic simulations of line-tied asymmetric magnetic reconnection in the context of solar flare and coronal mass ejection current sheets. The reconnection process is made asymmetric along the inflow direction by allowing the initial upstream magnetic field strengths and densities to differ, and along the outflow direction by placing the initial perturbation near a conducting wall boundary that represents the photosphere. When the upstream magnetic fields are asymmetric, the post-flare loop structure is distorted into a characteristic skewed candle flame shape. The simulations can thus be used to provide constraints on the reconnection asymmetry in post-flare loops. More hard X-ray emission is expected to occur at the footpoint on the weak magnetic field side because energetic particles are more likely to escape the magnetic mirror there than at the strong magnetic field footpoint. The footpoint on the weak magnetic field side is predicted to move more quickly because of the requirement in two dimensions that equal amounts of flux must be reconnected from each upstream region. The X-line drifts away from the conducting wall in all simulations with asymmetric outflow and into the strong magnetic field region during most of the simulations with asymmetric inflow. There is net plasma flow across the X-line for both the inflow and outflow directions. The reconnection exhaust directed away from the obstructing wall is significantly faster than the exhaust directed toward it. The asymmetric inflow condition allows net vorticity in the rising outflow plasmoid which would appear as rolling motions about the flux rope axis.

Funding ProjectNASA[NNX09AB17G] ; NASA[NNX11AB61G] ; NASA[NNM07AB07C] ; NASA[NNX09AH22G] ; NSF-REU at the Center for Astrophysics[ATM-0851866] ; NSF-SHINE[ATM0752257] ; Program 973[2011CB811403] ; NSFC[10873030] ; CAS[KJCX2-EW-T07] ; CAS[2010Y2JB16] ; Belgian Federal Science Policy Office through ESA-PRODEX[4000103240] ; NASA through the NASA Advanced Supercomputing (NAS) Division at Ames Research Center
Funding OrganizationNASA[NNX09AB17G, NNX11AB61G, NNM07AB07C, NNX09AH22G] ; NSF-REU at the Center for Astrophysics[ATM-0851866] ; NSF-SHINE[ATM0752257] ; Program 973[2011CB811403] ; NSFC[10873030] ; CAS[KJCX2-EW-T07, 2010Y2JB16] ; Belgian Federal Science Policy Office through ESA-PRODEX[4000103240] ; NASA through the NASA Advanced Supercomputing (NAS) Division at Ames Research Center
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
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000303814600056
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordHARD X-RAY ; ORDER FINITE-ELEMENTS ; FIELD LINE SHRINKAGE ; INITIAL PITCH-ANGLE ; CME CURRENT SHEETS ; FOOTPOINT EMISSIONS ; SUPRA-ARCADE ; MOTIONS ; LOOPS ; PROMINENCES
Citation statistics
Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6203
Collection太阳物理研究组
Corresponding AuthorMurphy, NA
Affiliation1.Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
2.Elmhurst College, Elmhurst, IL, USA
3.SIDC-Royal Observatory of Belgium, Avenue Circulaire 3, 1180 Brussels, Belgium
4.Yunnan Astronomical Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming, Yunnan 650011, China
Recommended Citation
GB/T 7714
Murphy, NA,Miralles, MP,Pope, CL,et al. ASYMMETRIC MAGNETIC RECONNECTION IN SOLAR FLARE AND CORONAL MASS EJECTION CURRENT SHEETS[J]. ASTROPHYSICAL JOURNAL,2012,751(1).
APA Murphy, NA.,Miralles, MP.,Pope, CL.,Raymond, JC.,Winter, HD.,...&Lin J.(2012).ASYMMETRIC MAGNETIC RECONNECTION IN SOLAR FLARE AND CORONAL MASS EJECTION CURRENT SHEETS.ASTROPHYSICAL JOURNAL,751(1).
MLA Murphy, NA,et al."ASYMMETRIC MAGNETIC RECONNECTION IN SOLAR FLARE AND CORONAL MASS EJECTION CURRENT SHEETS".ASTROPHYSICAL JOURNAL 751.1(2012).
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