Heuristic Description of Perpendicular Diffusion of Energetic Particles in Astrophysical Plasmas
Abstract
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.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 2019
- DOI:
- 10.3847/2041-8213/ab379d
- arXiv:
- arXiv:1908.00694
- Bibcode:
- 2019ApJ...881L..27S
- Keywords:
-
- solar wind;
- Astrophysics - Solar and Stellar Astrophysics;
- Physics - Plasma Physics;
- Physics - Space Physics
- E-Print:
- Paper was accepted by The Astrophysical Journal Letters on August 1st, 2019