Plasmaspheric hiss waves are essential for the pitch-angle scattering and precipitation of energetic electrons and interplanetary shocks may affect these waves. We present a case study on the responses of plasmaspheric hiss after an interplanetary shock arrival on 7 September 2017. Based on the observation by RBSP-B, the plasmaspheric hiss in different frequency ranges shows three different responses simultaneously: hiss waves with frequency below 0.08f_ce are weakened, waves within 0.08-0.18f_ce are weakened in magnetic power and modulated by the ultra-low frequency (ULF) waves in the electric power, while waves above 0.18f_ce are intensified in magnetic power and modulated by the ULF waves. Further analysis suggests that the hiss waves have different sources: low-frequency (<∼0.18f_ce) hiss waves are transmitted from chorus outside the plasmasphere, while high-frequency (>∼0.18f_ce) hiss waves are locally amplified. Our results provide a comprehensive view of the frequency-dependent hiss wave behavior after the impact of interplanetary shocks.

中文翻译：

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等离子层嘶嘶声对行星际冲击影响的频率相关响应

等离子层嘶嘶声对于高能电子的俯仰角散射和降水至关重要，行星际冲击可能会影响这些波。我们展示了一个关于 2017 年 9 月 7 日行星际冲击到达后等离子体层嘶嘶声响应的案例研究。 基于 RBSP-B 的观测，不同频率范围内的等离子体层嘶嘶声同时显示三种不同的响应：频率低于 0.08 f 的嘶嘶声波_ce减弱，0.08-0.18 f _ce范围内的波磁力减弱并被电功率中的超低频 (ULF) 波调制，而 0.18 f _ce以上的波被增强的磁力并被 ULF 波调制。进一步的分析表明，嘶嘶声波有不同的来源：低频（<~0.18 f _ce）嘶嘶声波从等离子体层外的合唱团传输，而高频（>~0.18 f _ce）嘶嘶声波被局部放大。我们的结果提供了行星际冲击影响后与频率相关的嘶嘶声波行为的综合视图。