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The Dependence of Particle Acceleration on Initial Locations in Reconnecting Current Sheets
Li Y(李燕)1,2; Winter, HD3; Murphy, NA3; Lin J(林隽)1,3; Ning, W4
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2013-10-25
Volume65Issue:5
DOI10.1093/pasj/65.5.101
Contribution Rank第1完成单位
Indexed BySCI
KeywordSun: Flares Sun: Magnetic Reconnection Sun: Particle Acceleration
Abstract

Electron and proton acceleration by a super-Dreicer electric field is investigated in a reconnecting current sheet in the presence of a guide field. The electric field is assumed to vary in space. Electrons and protons are accelerated from initial positions randomly distributed over the whole acceleration region. The stability of the energy spectrum is investigated using different numbers of test particles. The energy spectrum eventually obtained is consistent with a power-law spectrum. The spectral index of electrons increases rapidly with increasing guide field, but the index for the protons does not vary significantly. The relation of the final energy to the initial position is also studied. The results indicate that the addition of a guide field not only allows the reconnecting electric field to selectively accelerate electrons and protons from different initial positions, but also increases the number of accelerated electrons and reduces the number of protons. The final position and the pitch angles of the accelerated particles are also investigated. Finally, we also calculate the energy spectrum of particles initially distributed at the boundary of the reconnection inflow.

Funding ProjectProgram 973[2011CB811403] ; Program 973[2013CBA01503] ; NSFC[11273055] ; CAS[2010Y2JB16] ; CAS[KJCX2-EW-T07] ; NSF SHINE[AGS-1156076]
Funding OrganizationProgram 973[2011CB811403, 2013CBA01503] ; NSFC[11273055] ; CAS[2010Y2JB16, KJCX2-EW-T07] ; NSF SHINE[AGS-1156076]
Language英语
Subject Area天文学 ; 太阳与太阳系 ; 太阳物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherOXFORD UNIV PRESS
Publication PlaceGREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0004-6264
URL查看原文
Archive Date2014-02-27
WOS IDWOS:000328300300010
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSOLAR-FLARES ; PROTON ACCELERATION ; MAGNETIC-FIELD ; ELECTRON ACCELERATION ; ENERGY-SPECTRA ; ATMOSPHERE ; MODEL
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6218
Collection太阳物理研究组
Corresponding AuthorLi Y(李燕)
Affiliation1.Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, China
2.Graduate University of Chinese Academy of Sciences, Beijing 100039, China
3.Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
4.School of Tourism and Geography, Yunnan Normal University, Kunming 650031, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li Y,Winter, HD,Murphy, NA,et al. The Dependence of Particle Acceleration on Initial Locations in Reconnecting Current Sheets[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2013,65(5).
APA Li Y,Winter, HD,Murphy, NA,Lin J,&Ning, W.(2013).The Dependence of Particle Acceleration on Initial Locations in Reconnecting Current Sheets.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,65(5).
MLA Li Y,et al."The Dependence of Particle Acceleration on Initial Locations in Reconnecting Current Sheets".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 65.5(2013).
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