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Statistical and spectral properties of magnetic islands in reconnecting current sheets during two-ribbon flares
Shen CC(沈呈彩)1,2,3; Lin J(林隽)1,2; Murphy, NA2; Raymond, JC2; Shen, CC (reprint author), Chinese Acad Sci, Yunnan Astron Observ, POB 110, Kunming 650011, Yunnan, Peoples R China.
Source PublicationPHYSICS OF PLASMAS
2013-07
Volume20Issue:7Pages:1-12
DOI10.1063/1.4816711
Contribution Rank第1完成单位
Indexed BySCI ; EI
AbstractWe perform a set of two dimensional resistive magnetohydrodynamic simulations to study the reconnection process occurring in current sheets that develop during solar eruptions. Reconnection commences gradually and produces small-scale structures inside the current sheet, which has one end anchored to the bottom boundary and the other end open. The main features we study include plasmoids (or plasma blobs) flowing in the sheet, and X-points between pairs of adjacent islands. The statistical properties of the fine structure and the dependence of the spectral energy on these properties are examined. The flux and size distribution functions of plasmoids roughly follow inverse square power laws at large scales. The mass distribution function is steep at large scales and shallow at small scales. The size distribution also shows that plasmoids are highly asymmetric soon after being formed, while older plasmoids tend to be more circular. The spectral profiles of magnetic and kinetic energy inside the current sheet are both consistent with a power law. The corresponding spectral indices c are found to vary with the magnetic Reynolds number R-m of the system, but tend to approach a constant for large R-m (> 10(5)). The motion and growth of blobs change the spectral index. The growth of new islands causes the power spectrum to steepen, but it becomes shallower when old and large plasmoids leave the computational domain. (C) 2013 AIP Publishing LLC.
Funding OrganizationNASA [NNX11AB61G, NNM0FAB0FC] ; NSF SHINE [AGS-1156076] ; Program 973 [2011CB811403, 2013CBA01503] ; NSFC [11273055] ; CAS [KJCX2-EW-T07]
Language英语
Subject AreaPhysics
SubtypeArticle
ISSN1070-664X
URL查看原文
Archive Date2013-08-27
WOS IDWOS:000322535400018
WOS Research AreaPhysics
WOS SubjectPhysics, Fluids & Plasmas
WOS KeywordCORONAL MASS EJECTIONS ; SOLAR-FLARE ; NUMERICAL EXPERIMENTS ; SIMULATIONS ; INFLOWS ; MODEL ; INSTABILITIES ; ACCELERATION ; TEMPERATURE ; RESISTIVITY
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6227
Collection太阳物理研究组
Corresponding AuthorShen, CC (reprint author), Chinese Acad Sci, Yunnan Astron Observ, POB 110, Kunming 650011, Yunnan, Peoples R China.
Affiliation1.Yunnan Astronomical Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming, Yunnan 650011, China
2.Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138, USA
3.Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Shen CC,Lin J,Murphy, NA,et al. Statistical and spectral properties of magnetic islands in reconnecting current sheets during two-ribbon flares[J]. PHYSICS OF PLASMAS,2013,20(7):1-12.
APA Shen CC,Lin J,Murphy, NA,Raymond, JC,&Shen, CC .(2013).Statistical and spectral properties of magnetic islands in reconnecting current sheets during two-ribbon flares.PHYSICS OF PLASMAS,20(7),1-12.
MLA Shen CC,et al."Statistical and spectral properties of magnetic islands in reconnecting current sheets during two-ribbon flares".PHYSICS OF PLASMAS 20.7(2013):1-12.
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