Alfvén-Fast Wave Coupling in a 2D Nonuniform Medium

被引：1

作者：

Davies, R. ^{[1
]}

Wright, A. N. ^{[1
]}

机构：

[1] Univ St Andrews, Sch Math & Stat, St Andrews, Scotland

来源：

EARTH AND SPACE SCIENCE | 2023年 / 10卷 / 10期

基金：

英国科学技术设施理事会;

关键词：

magnetohydrodynamics; wave mode coupling; Alfven waves; magnetospheric physics; ALFVEN WAVES; PROPAGATION;

D O I：

10.1029/2023EA003167

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A 2D Cartesian simulation is presented and used to solve the ideal, low-beta, linear magnetohydrodynamics equations. A simulation is used to investigate the propagation of Alfv & eacute;n waves through inhomogeneities in Alfv & eacute;n speed and density. In particular, the loss of Alfv & eacute;n wave energy through coupling to the fast wave, and also the form of the Alfv & eacute;n wave as it emerges from the inhomogeneous region is studied. Potential applications of this include the magnetospheres of both Jupiter and the Earth. The results show that Alfv & eacute;n waves can be significantly distorted by a nonuniformity and still propagate through the region efficiently, with relatively small amounts of Alfv & eacute;n wave energy lost through mode conversion and reflection.

引用

页数：17

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