Macroscopic quasi-linear theory and particle-in-cell simulation of helium ion anisotropy instabilities

Peter H. Yoon*, Jungjoon Seough, Junga Hwang, Yasuhiro Nariyuki

*この論文の責任著者

研究成果: ジャーナルへの寄稿学術論文査読

23 被引用数 (Scopus)

抄録

The protons and helium ions in the solar wind are observed to possess anisotropic temperature profiles. The anisotropy appears to be limited by various marginal instability conditions. One of the efficient methods to investigate the global dynamics and distribution of various temperature anisotropies in the large-scale solar wind models may be that based upon the macroscopic quasi-linear approach. The present paper investigates the proton and helium ion anisotropy instabilities on the basis of the quasi-linear theory versus particle-in-cell simulation. It is found that the overall dynamical development of the particle temperatures is quite accurately reproduced by the macroscopic quasi-linear scheme. The wave energy development in time, however, shows somewhat less restrictive comparisons, indicating that while the quasi-linear method is acceptable for the particle dynamics, the wave analysis probably requires higher-order physics, such as wave-wave coupling or nonlinear wave-particle interaction.

本文言語英語
ページ(範囲)6071-6084
ページ数14
ジャーナルJournal of Geophysical Research A: Space Physics
120
8
DOI
出版ステータス出版済み - 2015/08/01

ASJC Scopus 主題領域

  • 地球物理学
  • 宇宙惑星科学

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