Mildly relativistic magnetized shocks in electron-ion plasmas - II. Particle acceleration and heating

被引：16

作者：

Ligorini, Arianna ^{[1
]}

Niemiec, Jacek ^{[1
]}

Kobzar, Oleh ^{[2
]}

Iwamoto, Masanori ^{[3
]}

Bohdan, Artem ^{[4
]}

Pohl, Martin ^{[4
,5
]}

Matsumoto, Yosuke ^{[6
]}

Amano, Takanobu ^{[7
]}

Matsukiyo, Shuichi ^{[3
]}

Hoshino, Masahiro ^{[7
]}

机构：

[1] Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland

[2] Jagiellonian Univ, Astron Observ, PL-30244 Krakow, Poland

[3] Kyushu Univ, Fac Engn Sci, Kasuga, Fukuoka 8168580, Japan

[4] DESY, D-15738 Zeuthen, Germany

[5] Univ Potsdam, Inst Phys & Astron, D-14476 Potsdam, Germany

[6] Chiba Univ, Dept Phys, Inage Ku, 1-33 Yayoi, Chiba 2638522, Japan

[7] Univ Tokyo, Dept Earth & Planetary Sci, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2021年 / 502卷 / 04期

关键词：

acceleration of particles; instabilities; plasmas; shock waves; methods: numerical; galaxies: jets; GAMMA-RAY; WAVES;

D O I：

10.1093/mnras/stab220

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：5065 / 5074

页数：10

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