Numerical Modeling of Suprathermal Electron Transport in the Solar Wind: Effects of Whistler Turbulence
Numerical Modeling of Suprathermal Electron Transport in the Solar Wind: Effects of Whistler Turbulence
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DOI：
10.3847/1538-4357/ab7a93
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发表时间：
2020-04
期刊：
影响因子：
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通讯作者：
B. Tang;G. Zank;V. Kolobov
中科院分区：
文献类型：
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作者：
B. Tang;G. Zank;V. Kolobov
太阳风电子速度分布函数明显偏离平衡麦克斯韦分布，由麦克斯韦核、超热晕、场向分量strahl和高能超晕组成。在动力学输运方程中引入了与哨声波湍流有关的波粒相互作用，用以描述超热电子与哨声波之间的相互作用，并解释了晕和strahl相对密度反向变化的现象。本文发展了一种有效的数值方法求解Fokker-Planck动力学输运方程。应用数值方法的超热电子在太阳风中的哨声波的存在。并将数值计算结果与实测结果进行了比较和分析。
The solar wind electron velocity distribution function deviates significantly from an equilibrium Maxwellian distribution and is composed of a Maxwellian core, a suprathermal halo, a field-aligned component strahl, and a higher-energy superhalo. Wave–particle interactions associated with whistler wave turbulence are introduced into the kinetic transport equation to describe the interaction between the suprathermal electrons and the whistler waves and to explain the observation that the halo and the strahl relative densities vary in an opposite sense. An efficient numerical method has been developed to solve the Fokker–Planck kinetic transport equation. Application of the numerical method to suprathermal electrons in the solar wind in the presence of whistler waves is presented. Comparison and analysis between the numerical results and observations are made.