Magnetic Relaxation and Particle Acceleration in a Flaring Twisted Coronal Loop

被引：30

作者：

Gordovskyy, M. ^{[1
]}

Browning, P. K. ^{[1
]}

机构：

[1] Univ Manchester, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England

来源：

SOLAR PHYSICS | 2012年 / 277卷 / 02期

基金：

英国科学技术设施理事会;

关键词：

Energetic particles; acceleration; Flares; energetic particles; Magnetic reconnection; theory; REVERSE-CURRENT; CURRENT SHEETS; SOLAR; RECONNECTION; MODEL; PLASMA;

D O I：

10.1007/s11207-011-9900-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In the present work we aim to study particle acceleration in twisted coronal loops. For this purpose, an MHD model of magnetic reconnection in a linearly unstable twisted magnetic fluxtube is considered. Further, the electric and magnetic fields obtained in the MHD simulations are used to calculate proton and electron trajectories in the guiding-centre approximation. It is shown that particle acceleration in such a model is distributed rather uniformly along the coronal loop and the high-energy population remains generally neutral. It also follows from the model that the horizontal cross-section of the volume occupied by high-energy particles near the loop footpoints increases with time, which can be used as an observational proxy.

引用

页码：299 / 316

页数：18

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