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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Two-Fluid Treatment of Whistling Behavior and the Warm Appleton-Hartree Extension
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Two-Fluid Treatment of Whistling Behavior and the Warm Appleton-Hartree Extension

机译：吹口哨的行为和双流体治疗温暖Appleton-Hartree扩展

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摘要

As an application of the completely general, ideal two-fluid analysis of waves in a warm ionelectron plasma, where six unique wave pair labels (S, A, F, M, O, and X) were identified, we here connect to the vast body of literature on whistler waves. We show that all six mode pairs can demonstrate whistling behavior, when we allow for whistling of both descending and ascending frequency types, and when we study the more general case of oblique propagation to the background magnetic field. We show how the general theory recovers all known approximate group speed expressions for both classical whistlers and ion cyclotron whistlers, which we here extend to include ion contributions and deviations from parallel propagation. At oblique angles and at perpendicular propagation, whistlers are investigated using exact numerical evaluations of the two-fluid dispersion relation and their group speeds under Earth's magnetosphere conditions. This approach allows for a complete overview of all whistling behavior and we quantify the typical frequency ranges where they must be observable. We use the generality of the theory to show that pair plasmas in pulsar magnetospheres also feature whistling behavior, although not of the classical type at parallel propagation. Whistling of the high-frequency modes is discussed as well, and we give the extension of the Appleton-Hartree relation for cold plasmas, to include the effect of a nonzero thermal electron velocity. We use it to quantify the Faraday rotation effect at all angles, and compare its predictions between the cold and warm Appleton-Hartree equation.
机译：作为应用程序的完全通用,理想温暖ionelectron双流体波的分析等离子体,六个独特的波对标签(年代,,F M O, X)被确定,我们在这里联系了在惠斯勒波文学的巨大的身体。我们表明,所有六个模式对可以证明吹口哨的行为,当我们允许吹口哨下行和上行频率类型,当我们研究的更一般的情况斜传播背景磁场字段。所有已知的近似速度表达式经典的啸叫声和离子回旋吹口哨的人,我们在这里扩展到包括离子贡献和偏离平行传播。垂直传播,啸叫声使用精确的数值评估调查二流体色散关系和他们的集团地球的磁层条件下的速度。这种方法允许完整的概述吹口哨的行为,我们量化典型的频率范围,他们必须可观察到的。表明对等离子体在脉冲星不但也吹口哨的行为,虽然不是古典类型的平行传播。模式进行了探讨,给出了Appleton-Hartree关系的延伸冷等离子体,包括一个非零的影响热电子速度。法拉第旋转效应的角度,比较其预测之间的寒冷和温暖Appleton-Hartree方程。

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