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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.
Source PublicationSOLAR PHYSICS
2012-07
Volume279Issue:1Pages:91-113
DOI10.1007/s11207-012-9956-1
Contribution Rank第1完成单位
Indexed BySCI
KeywordSolar Flares Magnetic Reconnection Current Sheet Energetic Particles
AbstractKinematic 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.
Funding OrganizationProgram 973 grant [2011CB811403] ; NSFC [10873030, 10903027] ; Yunnan Science Foundation of China [2009CD120] ; NASA [NNX11AB61G] ; Smithsonian Institution
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0038-0938
URL查看原文
Archive Date2012-06-25
WOS IDWOS:000305130700006
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordCORONAL MASS EJECTIONS ; PARTICLE-ACCELERATION ; MAGNETIC RECONNECTION ; SOLAR-FLARES ; ENERGY-SPECTRUM ; 2-RIBBON FLARES ; FIELD ; MODEL ; SEPARATION ; TURBULENCE
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Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6201
Collection太阳物理研究组
Corresponding AuthorLi, Y (reprint author), Chinese Acad Sci, Yunnan Astron Observ, Kunming 650011, Peoples R China.
Affiliation1.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
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
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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