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Precursor Wave Amplification by Ion-Electron Coupling through Wakefield in Relativistic Shocks

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arxiv 1909.03337 v1 pith:4V3PIBI5 submitted 2019-09-07 astro-ph.HE physics.plasm-ph

Masanori Iwamoto , Takanobu Amano , Masahiro Hoshino , Yosuke Matsumoto , Jacek Niemiec , Arianna Ligorini , Oleh Kobzar , Martin Pohl This is my paper · ORCID
classification astro-ph.HEphysics.plasm-ph
keywords wavecouplingemissionion-electronprecursorprocessrelativisticshocks
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We investigated electromagnetic precursor wave emission in relativistic shocks by using two-dimensional particle-in-cell simulations. We found that the wave amplitude is significantly enhanced by a positive feedback process associated with ion-electron coupling through the wakefields for high magnetization. The wakefields collapse during the nonlinear process of the parametric decay instability in the near-upstream region, where nonthermal electrons and ions are generated. The intense coherent emission and the particle acceleration may opperate in high-energy astrophysical objects.

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  1. Relativistically Magnetized Collisionless Shocks in Pair Plasma: I. Solitons, Chaos, and Thermalization

    astro-ph.HE 2024-11 conditional novelty 7.0 of 10

    In strongly magnetized pair-plasma shocks, chaotic particle orbits inside a soliton train can fully account for dissipation and thermalization without invoking collective plasma instabilities.

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