Statistical and spectral properties of magnetic islands in reconnecting current sheets during two-ribbon flares

	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, NA 2; Raymond, JC 2
刊名	PHYSICS OF PLASMAS
	2013-07
卷号	20 期号:7 页码:1-12
ISSN号	1070-664X
通讯作者	Shen, CC (reprint author), Chinese Acad Sci, Yunnan Astron Observ, POB 110, Kunming 650011, Yunnan, Peoples R China.
产权排序	第一完成单位
英文摘要	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.
学科主题	Physics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Physics, Fluids & Plasmas
研究领域[WOS]	Physics
关键词[WOS]	CORONAL MASS EJECTIONS ; SOLAR-FLARE ; NUMERICAL EXPERIMENTS ; SIMULATIONS ; INFLOWS ; MODEL ; INSTABILITIES ; ACCELERATION ; TEMPERATURE ; RESISTIVITY
收录类别	SCI ; EI
原文出处	http://scitation.aip.org/content/aip/journal/pop/20/7/10.1063/1.4816711
语种	英语
WOS记录号	WOS:000322535400018
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/6227]
专题	云南天文台_太阳物理研究组
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
推荐引用方式 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.(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.