Electron Acceleration in a Dynamically Evolved Current Sheet Under Solar   Coronal Conditions

doi:10.1007/s11207-013-0414-5

CORC > 北京大学 > 地球与空间科学学院

	Electron Acceleration in a Dynamically Evolved Current Sheet Under Solar Coronal Conditions
	Zhang, Shaohua ; Du, A. M. ; Feng, Xueshang ; Cao, Xin ; Lu, Quanming ; Yang, Liping ; Chen, Gengxiong ; Zhang, Ying
刊名	solar physics
	2014
关键词	Solar flare Electron acceleration Magnetic reconnection Magnetic island Parallel electric field COLLISIONLESS MAGNETIC RECONNECTION ADAPTIVE MESH REFINEMENT PARTICLE-ACCELERATION ISLANDS FLARES COALESCENCE MAGNETOHYDRODYNAMICS FIELD
DOI	10.1007/s11207-013-0414-5
英文摘要	Electron acceleration in a drastically evolved current sheet under solar coronal conditions is investigated via the combined 2.5-dimensional (2.5D) resistive magnetohydrodynamics (MHD) and test-particle approaches. Having a high magnetic Reynolds number (10(5)), the long, thin current sheet is torn into a chain of magnetic islands, which grow in size and coalesce with each other. The acceleration of electrons is explored in three typical evolution phases: when several large magnetic islands are formed (phase 1), two of these islands are approaching each other (phase 2), and almost merging into a "monster" magnetic island (phase 3). The results show that for all three phases electrons with an initial Maxwell distribution evolve into a heavy-tailed distribution and more than 20 % of the electrons can be accelerated higher than 200 keV within 0.1 second and some of them can even be energized up to MeV ranges. The lower-energy electrons are located away from the magnetic separatrices and the higher-energy electrons are inside the magnetic islands. The most energetic electrons have a tendency to be around the outer regions of the magnetic islands or to appear in the small secondary magnetic islands. It is the trapping effect of the magnetic islands and the distributions of E (p) that determine the acceleration and spatial distributions of the energetic electrons.; Astronomy & Astrophysics; SCI(E); 1; ARTICLE; amdu@mail.iggcas.ac.cn; 5; 1607-1623; 289
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/215801]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Zhang, Shaohua,Du, A. M.,Feng, Xueshang,et al. Electron Acceleration in a Dynamically Evolved Current Sheet Under Solar Coronal Conditions[J]. solar physics,2014.
APA	Zhang, Shaohua.,Du, A. M..,Feng, Xueshang.,Cao, Xin.,Lu, Quanming.,...&Zhang, Ying.(2014).Electron Acceleration in a Dynamically Evolved Current Sheet Under Solar Coronal Conditions.solar physics.
MLA	Zhang, Shaohua,et al."Electron Acceleration in a Dynamically Evolved Current Sheet Under Solar Coronal Conditions".solar physics (2014).