Macroscopic quasi‐linear theory of electromagnetic electron cyclotron instability associated with core and halo solar wind electrons
Macroscopic quasi‐linear theory of electromagnetic electron cyclotron instability associated with core and halo solar wind electrons
复制标题
与核心和晕太阳风电子相关的电磁电子回旋不稳定性的宏观拟线性理论
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
H. Shah
中科院分区：
文献类型：
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作者：
M. Sarfraz;Sundas Saeed;P. Yoon;G. Abbas;H. Shah
航天器在1 Au附近的观测表明，太阳风核心和晕圈电子都表现出温度各向异性，这种温度各向异性似乎受边缘电磁电子回旋不稳定性条件的控制。在文献中，这种不稳定性的阈值条件，对于T ε>T ε起作用，已经被表示为温度各向异性T ε/T ε与平行β β之间的逆相关，但是这样的关系是基于线性稳定性分析结合经验拟合推导的。另一方面，本文对太阳风电子的核-晕双分量模型进行了宏观准线性分析，以遵循核和晕温度发展的自洽时间历程以及磁场扰动波能量的动力学。在本分析中，核心和晕温度各向异性和平行β的逆相关性自然地从自洽理论的解中出现。目前的研究结果表明，宏观准线性方法可能有助于模拟太阳风电子的动力学。
Spacecraft observations made near 1 AU show that both core and halo solar wind electrons exhibit temperature anisotropies that appear to be regulated by marginal electromagnetic electron cyclotron instability condition. In the literature, the threshold conditions of this instability, operative for T⊥>T∥, have been expressed as an inverse correlation between the temperature anisotropy, T⊥/T∥, and parallel beta, β∥, but such a relation was deduced on the basis of linear stability analysis combined with empirical fitting. The present paper, on the other hand, employs macroscopic quasi‐linear analysis for core‐halo two‐component model of the solar wind electrons, in order to follow the self‐consistent time history of the core and halo temperature development as well as the dynamics of magnetic field perturbation wave energy. In the present analysis, the inverse correlation for core and halo temperature anisotropy and parallel beta naturally emerges from the solutions of self‐consistent theory. The present findings indicate that the macroscopic quasi‐linear method may be useful for modeling the dynamics of solar wind electrons.
双卡帕分布等离子体中电磁电子回旋不稳定性的非线性演化
影响因子：
2.2
作者：
Eliasson B
通讯作者：
Eliasson B