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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Whistler on a Shelf
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Whistler on a Shelf

机译：惠斯勒在架子上

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摘要

This study presents results from a numerical study of the guiding of VLF whistler-mode waves along the ambient magnetic field by the shelf-like density structures observed by the NASA Van Allen Probes satellites in the equatorial plasmasphere. The shelf-duct consists of a homogeneous central part "sandwiched" between two density gradients pointing in the same direction. To the best of our knowledge, this type of whistler ducting has never been identified in observations before. Our investigation is based on simulations of the electron-MHD model, and our goal is to explain the mechanism of providing wave trapping and to reproduce the structure of the observed waves. The main result from this study is that the shelf-like, field-aligned density irregularities can indeed guide whistlermode waves along the ambient magnetic field with little attenuation, and the parameters of the guided waves are defined by the parameters of the duct. The simulations reproduce the structure of the observed waves reasonably well.
机译：本研究提出了一个数值研究的结果指导的甚低频whistler-mode波杨树的环境磁场由美国宇航局范艾伦密度结构观察探测卫星在赤道等离子体层。shelf-duct由同质的中央“夹”两个密度梯度之间的一部分指向相同的方向。我们所知,这种类型的惠斯勒管道以前从来没有被确认在观察。调查是基于模拟electron-MHD模型,我们的目标是解释提供波捕获和机制繁殖的结构观察海浪。本研究的主要结果是杨树,field-aligned密度违规行为确实可以指导whistlermode波沿周围的磁场衰减很小,和导波的参数由管的参数定义的。模拟再现的结构观察到的波相当不错。

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