Bidirectional Energy Cascades and the Origin of Kinetic Alfvenic and Whistler Turbulence in the Solar Wind

被引：26

作者：

Che, H. ^{[1
]}

Goldstein, M. L. ^{[1
]}

Vinas, A. F. ^{[1
]}

机构：

[1] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 06期

关键词：

DISSIPATION RANGE; SPECTRUM; DYNAMICS; CORONA; WAVES; AU;

D O I：

10.1103/PhysRevLett.112.061101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The observed steep kinetic scale turbulence spectrum in the solar wind raises the question of how that turbulence originates. Observations of keV energetic electrons during solar quiet time suggest them as a possible source of free energy to drive kinetic turbulence. Using particle-in-cell simulations, we explore how the free energy released by an electron two-stream instability drives Weibel-like electromagnetic waves that excite wave-wave interactions. Consequently, both kinetic Alfvenic and whistler turbulence are excited that evolve through inverse and forward magnetic energy cascades.

引用

页数：5

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