Two-band whistler-mode waves excited by an electron bi-Maxwellian distribution 
plus parallel beams

Chen, Huayue; Sauer, K.; Lu, Quanming; Gao, Xinliang; Wang, Shaojie

doi:10.1063/5.0026220

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Two-band whistler-mode waves excited by an electron bi-Maxwellian distribution plus parallel beams

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Sauer, K.
MPI for Aeronomy, Max Planck Institute for Solar System Research, Max Planck Society;

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Citation

Chen, H., Sauer, K., Lu, Q., Gao, X., & Wang, S. (2020). Two-band whistler-mode waves excited by an electron bi-Maxwellian distribution plus parallel beams. AIP Advances, 10(12): 125010. doi:10.1063/5.0026220.

Cite as: https://hdl.handle.net/21.11116/0000-0008-11D7-2

Abstract

The characteristics of whistler-mode waves excited by temperature anisotropic electrons, whose velocity distribution is a combination of bi-Maxwellian distribution and beam-like shapes, are investigated by both linear theory analysis and particle-in-cell simulation. A frequency gap is formed between two peaks, which is caused by the mode splitting of beam-like electrons. We have further investigated the influences of different parameters and found that the position of beam-like shape is the key parameter in determining the frequency of power gap. Moreover, the beam-like component on one direction will lead to the gap in the spectra of waves propagating in the opposite direction. Our study can shed light on the effects of beam-like electrons on the spectra of whistler-mode waves.