4.5 Article

Kinetic Alfven Waves Near a Dissipative Layer

期刊

出版社

AMER GEOPHYSICAL UNION
DOI: 10.1029/2021JA029580

关键词

kinetic Alfven waves (KAWs); phase shift; magnetosphere; dissipative layer; SAR arcs

资金

  1. Ministry of Science and Higher Education of the Russian Federation [II.16]
  2. RFBR [20i-55-53009]

向作者/读者索取更多资源

This study examines the spatial structure of kinetic Alfven waves near a dissipative layer, exploring the changes in dispersion type and phase shifts in the wave characteristics. The absorption of Alfven wave energy in the dissipative layer can lead to the formation of electron fluxes and stable auroral red arcs. An analytical formula is proposed for determining the density of the electron flux toward the ionosphere and the flux of the energy transferred by them.
The spatial structure of kinetic Alfven waves near a dissipative layer is examined. The type of dispersion for kinetic Alfven waves (KAWs) changes inside the dissipative layer: from cold, when the transverse (across the magnetic shells) wavelength is determined by the electron skin depth in plasma, to warm dispersion, when the wavelength is determined by the ion Larmor radius. The characteristic transverse length of a KAW is complex in the dissipative layer, because it decays strongly when interacting with background plasma electrons. The features of phase shifts between the transverse electromagnetic field components of Alfven oscillations are considered. Phase shift can be used to identify the type of Alfven waves observed by satellites in the vicinity of the dissipative layer. The Alfven wave energy absorption in the dissipative layer can lead to the formation of electron fluxes (with electron energies of 2-5 eV) toward the ionosphere and initiate here the stable auroral red (SAR) arcs. An analytical formula is proposed for determining the density of the electron flux toward the ionosphere and the flux of the energy transferred by them.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.5
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据