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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.
发表期刊PHYSICS OF PLASMAS
2013-07
卷号20期号:7页码:1-12
DOI10.1063/1.4816711
产权排序第1完成单位
收录类别SCI ; EI
摘要We 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.
项目资助者NASA [NNX11AB61G, NNM0FAB0FC] ; NSF SHINE [AGS-1156076] ; Program 973 [2011CB811403, 2013CBA01503] ; NSFC [11273055] ; CAS [KJCX2-EW-T07]
语种英语
学科领域Physics
文章类型Article
ISSN1070-664X
URL查看原文
归档日期2013-08-27
WOS记录号WOS:000322535400018
WOS研究方向Physics
WOS类目Physics, Fluids & Plasmas
关键词[WOS]CORONAL MASS EJECTIONS ; SOLAR-FLARE ; NUMERICAL EXPERIMENTS ; SIMULATIONS ; INFLOWS ; MODEL ; INSTABILITIES ; ACCELERATION ; TEMPERATURE ; RESISTIVITY
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6227
专题太阳物理研究组
通讯作者Shen, CC (reprint author), Chinese Acad Sci, Yunnan Astron Observ, POB 110, Kunming 650011, Yunnan, Peoples R China.
作者单位1.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
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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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