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Acceleration of Electrons and Protons in Reconnecting Current Sheets Including Single or Multiple X-points
Li Y(李燕)1,2; Lin J(林隽)1,3; Li, Y (reprint author), Chinese Acad Sci, Yunnan Astron Observ, Kunming 650011, Peoples R China.
发表期刊SOLAR PHYSICS
2012-07
卷号279期号:1页码:91-113
DOI10.1007/s11207-012-9956-1
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收录类别SCI
关键词Solar Flares Magnetic Reconnection Current Sheet Energetic Particles
摘要Kinematic characteristics of electrons and protons in the magnetic reconnecting current sheet in the presence of a guide field are investigated. Particle trajectories are calculated for different values of the guide field by a test-particle calculation. The relationship between the final energy and the initial position has also been studied. We found that the addition of a guide field not only allows particles to get more energy and not only results in the separation of electrons and protons, but also causes the reconnecting electric field to selectively accelerate electrons and protons for different initial positions. The energy spectrum eventually obtained is the common power-law spectrum, and as the guide field increases, the index for the spectrum of electrons decreases rapidly. However, for a weak background magnetic field, proton spectra are not very sensitive to the guide field; but for a strong background field, the dependence of the spectrum index is similar to the electron spectrum. Meanwhile, kinematic characteristics of the accelerated particles in the current sheet including multiple X-points and O-points were also investigated. The result indicates that the existence of the multiple X- and O-points helps particles trapped in the accelerating region to gain more energy, and yields the double or multiple power-law feature.
项目资助者Program 973 grant [2011CB811403] ; NSFC [10873030, 10903027] ; Yunnan Science Foundation of China [2009CD120] ; NASA [NNX11AB61G] ; Smithsonian Institution
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0038-0938
URL查看原文
归档日期2012-06-25
WOS记录号WOS:000305130700006
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]CORONAL MASS EJECTIONS ; PARTICLE-ACCELERATION ; MAGNETIC RECONNECTION ; SOLAR-FLARES ; ENERGY-SPECTRUM ; 2-RIBBON FLARES ; FIELD ; MODEL ; SEPARATION ; TURBULENCE
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6201
专题太阳物理研究组
通讯作者Li, Y (reprint author), Chinese Acad Sci, Yunnan Astron Observ, Kunming 650011, Peoples R China.
作者单位1.Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming, 650011, China
2.Graduate University of Chinese Academy of Sciences, Beijing, 10049, China
3.Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA, 02138, USA
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GB/T 7714
Li Y,Lin J,Li, Y . Acceleration of Electrons and Protons in Reconnecting Current Sheets Including Single or Multiple X-points[J]. SOLAR PHYSICS,2012,279(1):91-113.
APA Li Y,Lin J,&Li, Y .(2012).Acceleration of Electrons and Protons in Reconnecting Current Sheets Including Single or Multiple X-points.SOLAR PHYSICS,279(1),91-113.
MLA Li Y,et al."Acceleration of Electrons and Protons in Reconnecting Current Sheets Including Single or Multiple X-points".SOLAR PHYSICS 279.1(2012):91-113.
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