Stochastic electron acceleration during spontaneous turbulent reconnection in a strong shock wave

Author:

Matsumoto Y.1,Amano T.2,Kato T. N.3,Hoshino M.2

Affiliation:

1. Department of Physics, Chiba University 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan.

2. Department of Earth and Planetary Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.

3. Center for Computational Astrophysics, National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.

Abstract

Shocking! Particle accelerators in space The acceleration of charged particles to high energies has been a major mystery, with a number of competing theories based on plasma physics. Many include the concept of turbulence, but with different roles. For example, shock-based theories emphasize the importance of turbulence developed from an unstable shock layer, whereas turbulent reconnection theories emphasize interactions of multiple reconnection sites. Matsumoto et al. present results of a large particle-in-cell simulation and examine how electrons are accelerated in the transition layer of a fast nonrelativistic shock (see the Perspective by Ji and Zweibel). Surprisingly, they find that when the shock is strong enough, charged particles (electrons in this case) are efficiently accelerated by turbulent reconnection within a turbulent shock layer containing multiscale structures. Science , this issue p. 974 ; see also p. 944

Funder

Japan Society for the Promotion of Science

Ministry of Education, Culture, Sports, Science and Technology

Joint Institute for Computational Fundamental Science

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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