Mildly relativistic magnetized shocks in electron-ion plasmas - II. Particle acceleration and heating
Mildly relativistic magnetized shocks in electron-ion plasmas - II. Particle acceleration and heating
复制标题
电子离子等离子体中的弱相对论性磁化冲击 - II。
DOI：
10.1093/mnras/stab220
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发表时间：
2021
影响因子：
4.8
通讯作者：
Hoshino Masahiro
中科院分区：
文献类型：
--
作者：
Ligorini Arianna;Niemiec Jacek;Kobzar Oleh;Iwamoto Masanori;Bohdan Artem;Pohl Martin;Matsumoto Yosuke;Amano Takanobu;Matsukiyo Shuichi;Hoshino Masahiro
在电子-离子等离子体中，粒子在轻度相对论性磁化冲击下的加速和加热，采用前所未有的高分辨率二维粒子在电池中的模拟进行了研究，其中包括离子尺度的激波。电子在激波中被超绝热加热，大部分从质子到电子的能量转移发生在激波或激波下游。我们是第一个证明激波涟漪对激波中电子的能量至关重要的人。它们仍然远远低于与质子的均分。下游电子能谱近似为热能谱，具有有限的超热幂律分量。我们的结果在尾流场加速和耀变体核心电磁辐射建模的背景下进行了讨论。
Particle acceleration and heating at mildly relativistic magnetized shocks in electron–ion plasma are investigated with unprecedentedly high-resolution 2D particle-in-cell simulations that include ion-scale shock rippling. Electrons are super-adiabatically heated at the shock, and most of the energy transfer from protons to electrons takes place at or downstream of the shock. We are the first to demonstrate that shock rippling is crucial for the energization of electrons at the shock. They remain well below equipartition with the protons. The downstream electron spectra are approximately thermal with a limited supra-thermal power-law component. Our results are discussed in the context of wakefield acceleration and the modelling of electromagnetic radiation from blazar cores.