Heuristic Description of Perpendicular Diffusion of Energetic Particles in Astrophysical Plasmas

被引：24
作者：
Shalchi, A. [1 ]
机构：
[1] Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada
来源：
ASTROPHYSICAL JOURNAL LETTERS | 2019年 / 881卷 / 02期
关键词：
solar wind; CHARGED-PARTICLES; TRANSPORT; COEFFICIENT; TURBULENCE; RECOVERY;
D O I：
10.3847/2041-8213/ab379d
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A heuristic approach for collisionless perpendicular diffusion of energetic particles is presented. Analytic forms for the corresponding diffusion coefficient are derived. The heuristic approach presented here explains the parameter a(2) used in previous theories in order to achieve agreement with simulations and its relation to collisionless Rechester & Rosenbluth diffusion. The obtained results are highly relevant for applications because previously used formulas are altered significantly in certain situations.
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页数：5
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