Kinetic Heating by Alfve′n Waves in magnetic Shears

被引：15

作者：

Bacchini, Fabio ^{[1
]}

Pucci, Francesco ^{[1
,2
]}

Malara, Francesco ^{[3
]}

Lapenta, Giovanni ^{[1
]}

机构：

[1] Katholieke Univ Leuven, Dept Math, Ctr Math Plasma Astrophys, Celestijnenlaan 200B, B-3001 Leuven, Belgium

[2] Consiglio Nazl Ric ISTP CNR, Ist Sci & Tecnol Plasmi, Via Amendola 122-D, I-70126 Bari, Italy

[3] Univ Calabria, Dipartimento Fis, I-87036 Arcavacata Di Rende, CS, Italy

来源：

PHYSICAL REVIEW LETTERS | 2022年 / 128卷 / 02期

基金：

欧盟地平线“2020”;

关键词：

MAGNETOHYDRODYNAMIC TURBULENCE; SMALL SCALES; DISSIPATION; PLASMA; PROPAGATION; RESONANCE;

D O I：

10.1103/PhysRevLett.128.025101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

With first-principles kinetic simulations, we show that a large-scale Alfve ' n wave (AW) propagating in an inhomogeneous background decays into kinetic Alfve ' n waves (KAWs), triggering ion and electron energization. We demonstrate that the two species can access unequal amounts of the initial AW energy, experiencing differential heating. During the decay process, the electric field carried by KAWs produces non-Maxwellian features in the particle velocity distribution functions, in accordance with space observations. The process we present solely requires the interaction of a large-scale AW with a magnetic

引用

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