Effect of Collisions and Magnetic Convergence on Electron Acceleration and Transport in Reconnecting Twisted Solar Flare Loops

被引：35
|
作者：
Gordovskyy, M. [1 ]
Browning, P. K. [1 ]
Kontar, E. P. [2 ]
Bian, N. H. [2 ]
机构：
[1] Univ Manchester, Ctr Astrophys, Jodrell Bank, Manchester M13 9PL, Lancs, England
[2] Univ Glasgow, Sch Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland
来源：
SOLAR PHYSICS | 2013年 / 284卷 / 02期
基金：
英国科学技术设施理事会;
关键词：
Flares; energetic particles; Magnetic reconnection; theory; Energetic particles; acceleration; PARTICLE-ACCELERATION; ENERGETIC ELECTRONS; MODEL;
D O I：
10.1007/s11207-012-0124-4
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study a model of particle acceleration coupled with an MHD model of magnetic reconnection in unstable twisted coronal loops. The kink instability leads to the formation of helical currents with strong parallel electric fields resulting in electron acceleration. The motion of electrons in the electric and magnetic fields of the reconnecting loop is investigated using a test-particle approach taking into account collisional scattering. We discuss the effects of Coulomb collisions and magnetic convergence near loop footpoints on the spatial distribution and energy spectra of high-energy electron populations and possible implications on the hard X-ray emission in solar flares.
引用
收藏
页码：489 / 498
页数：10
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