YNAO OpenIR  > 太阳物理研究组
The plasmoid instability during asymmetric inflow magnetic reconnection
Murphy, NA1; Young, AK1,2; Shen CC(沈呈彩)1,3,4; Lin J(林隽)1,3; Ni L(倪蕾)3; Murphy, NA (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
发表期刊PHYSICS OF PLASMAS
2013-06
卷号20期号:6
DOI10.1063/1.4811470
产权排序第3完成单位
收录类别SCI ; EI
摘要Theoretical studies of the plasmoid instability generally assume that the reconnecting magnetic fields are symmetric. We relax this assumption by performing two-dimensional resistive magnetohydrodynamic simulations of the plasmoid instability during asymmetric inflow magnetic reconnection. Magnetic asymmetry modifies the onset, scaling, and dynamics of this instability. Magnetic islands develop preferentially into the weak magnetic field upstream region. Outflow jets from individual X-points impact plasmoids obliquely rather than directly as in the symmetric case. Consequently, deposition of momentum by the outflow jets into the plasmoids is less efficient, the plasmoids develop net vorticity, and shear flow slows down secondary merging between islands. Secondary merging events have asymmetry along both the inflow and outflow directions. Downstream plasma is more turbulent in cases with magnetic asymmetry because islands are able to roll around each other after exiting the current sheet. As in the symmetric case, plasmoid formation facilitates faster reconnection for at least small and moderate magnetic asymmetries. However, when the upstream magnetic field strengths differ by a factor of 4, the reconnection rate plateaus at a lower value than expected from scaling the symmetric results. We perform a parameter study to investigate the onset of the plasmoid instability as a function of magnetic asymmetry and domain size. There exist domain sizes for which symmetric simulations are stable but asymmetric simulations are unstable, suggesting that moderate magnetic asymmetry is somewhat destabilizing. We discuss the implications for plasmoid and flux rope formation in solar eruptions, laboratory reconnection experiments, and space plasmas. The differences between symmetric and asymmetric simulations provide some hints regarding the nature of the three-dimensional plasmoid instability. (C) 2013 AIP Publishing LLC.
项目资助者NASA [NNX09AB17G, NNX11AB61G, NNX12AB25G, NNM07AB07C] ; NSF SHINE [AGS-1156076] ; NSF-REU solar physics program at the Center for Astrophysics [ATM-0851866]
语种英语
学科领域Physics
文章类型Article
ISSN1070-664X
URL查看原文
WOS记录号WOS:000321273200013
WOS研究方向Physics
WOS类目Physics, Fluids & Plasmas
关键词[WOS]EJECTION CURRENT SHEETS ; CORONAL MASS EJECTIONS ; SOLAR-FLARES ; TEARING INSTABILITY ; NUMERICAL EXPERIMENTS ; DAYSIDE MAGNETOPAUSE ; DENSITY ASYMMETRY ; SIMULATION ; ERUPTION ; MODE
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6230
专题太阳物理研究组
通讯作者Murphy, NA (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
作者单位1.Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA
2.Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA
3.Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming, Yunnan 650011, China
4.Graduate School of the Chinese Academy of Sciences, Beijing 100049, China
推荐引用方式
GB/T 7714
Murphy, NA,Young, AK,Shen CC,et al. The plasmoid instability during asymmetric inflow magnetic reconnection[J]. PHYSICS OF PLASMAS,2013,20(6).
APA Murphy, NA,Young, AK,Shen CC,Lin J,Ni L,&Murphy, NA .(2013).The plasmoid instability during asymmetric inflow magnetic reconnection.PHYSICS OF PLASMAS,20(6).
MLA Murphy, NA,et al."The plasmoid instability during asymmetric inflow magnetic reconnection".PHYSICS OF PLASMAS 20.6(2013).
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
The plasmoid instabi(3359KB)期刊论文作者接受稿开放获取CC BY-NC-SA浏览 请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Murphy, NA]的文章
[Young, AK]的文章
[Shen CC(沈呈彩)]的文章
百度学术
百度学术中相似的文章
[Murphy, NA]的文章
[Young, AK]的文章
[Shen CC(沈呈彩)]的文章
必应学术
必应学术中相似的文章
[Murphy, NA]的文章
[Young, AK]的文章
[Shen CC(沈呈彩)]的文章
相关权益政策
暂无数据
收藏/分享
文件名: The plasmoid instability during asymmetric inflow magnetic reconnection.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。