Precursor Wave Amplification by Ion-Electron Coupling through Wakefield in Relativistic Shocks
High Energy Astrophysical Phenomena
2019-10-02 v1 Plasma Physics
Abstract
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.
Cite
@article{arxiv.1909.03337,
title = {Precursor Wave Amplification by Ion-Electron Coupling through Wakefield in Relativistic Shocks},
author = {Masanori Iwamoto and Takanobu Amano and Masahiro Hoshino and Yosuke Matsumoto and Jacek Niemiec and Arianna Ligorini and Oleh Kobzar and Martin Pohl},
journal= {arXiv preprint arXiv:1909.03337},
year = {2019}
}
Comments
7 pages, 4 figures, accepted to ApJL