Particle acceleration scalings based on exact analytic models for magnetic reconnection

被引:39
作者
Craig, IJD
Litvinenko, YE
机构
[1] Univ Waikato, Dept Math, Hamilton, New Zealand
[2] Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03824 USA
关键词
acceleration of particles; MHD; Sun : activity; Sun : flares; Sun : magnetic fields;
D O I
10.1086/339578
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Observations suggest that particle acceleration in solar flares occurs in the magnetic reconnection region above the are loops. Theoretical models for particle acceleration by the reconnection electric field, however, employ heuristic configurations for electric and magnetic fields in model current sheets, which are not solutions to the MHD reconnection problem. In the present study, particle acceleration is discussed within the context of a self-consistent MHD reconnection solution. This has the advantage of allowing poorly constrained local parameters in the current sheet region to be expressed in terms of the boundary conditions and electric resistivity of the global solution. The resulting acceleration model leads to energy gains that are consistent with those for high-energy particles in solar flares. The overall self-consistency of the approach is discussed.
引用
收藏
页码:387 / 394
页数:8
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