Two-band whistler-mode waves excited by an electron bi-Maxwellian distribution plus parallel beams
Source abstract
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.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Ionosphere and magnetosphere dynamics · Atmospheric Ozone and Climate · Atmospheric aerosols and clouds
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
CAS Key Laboratory of Geoscience Environment, School of Earth and Space Sciences, University of Science and Technology of China 1 , Hefei 230026, China
CAS Center for Excellence in Comparative Planetology 2 , Hefei 230026, China
Max-Planck-Institute for Solar System Research 3 , Göttingen 37077, Germany
CAS Key Laboratory of Geoscience Environment, Department of Modern Physics, University of Science and Technology of China 4 , Hefei 230026, China
Funding
Strategic Priority Research Program of Chinese Academy of Science · National Natural Science Foundation of China · Young Elite Scientists Sponsorship Program by CAST · Key Research Program of Frontier Sciences, CAS
References (34)
Show source-provided references
1. Limit on stably trapped particle fluxes10.1029/JZ071i001p00001 ↗
2. Banded chorus—A new type of VLF radiation observed in the magnetosphere by OGO 1 and OGO 310.1029/JA074i011p03002 ↗
3. Postmidnight chorus: A substorm phenomenon10.1029/JA079i001p00118 ↗
4. Two types10.1029/JA082i032p05112 ↗
5. In situ evidence of resonant interactions between energetic electrons and whistler waves in magnetopause reconnection10.26464/epp2019048 ↗
6. Relativistic theory of wave-particle resonant diffusion with application to electron acceleration in the magnetosphere10.1029/98JA01740 ↗
7. Timescale for radiation belt electron acceleration by whistler mode chorus waves10.1029/2004JA010811 ↗
8. Modeling of outer radiation belt electron by multidimensional diffusion process10.1029/2008JA013580 ↗
9. Rapid local acceleration of relativistic radiation-belt electrons by magnetospheric chorus10.1038/Nature12889 ↗
10. Resonant scattering of plasma sheet electrons by whistler-mode chorus: Contribution to diffuse auroral precipitation10.1029/2008GL034032 ↗
11. Scattering by chorus wave as the dominant cause of diffuse auroral precipitation10.1038/nature09467 ↗
12. Energetic electron (>10 keV) microburst precipitation, ∼5–15 s X-ray pulsations, chorus, and wave-particle interactions: A review10.1002/jgra.50264 ↗
13. OGO 3 observations of ELF noise in the magnetosphere: 1. Spatial extent and frequency of occurrence10.1029/JA074i003p00755 ↗
14. 1979 · 74
15. Linear theory of electron temperature anisotropy instabilities: Whistler, mirror, and Weibel10.1029/2006JA011764 ↗
16. Electromagnetic instabilities excited by electron temperature anisotropy10.1088/0256-307X/21/8/029 ↗
17. Particle-in-cell simulations of whistler waves excited by an electron distribution in space plasma10.1029/2009JA014580 ↗
18. Nonlinear evolution of counter-propagating whistler mode waves excited by anisotropic electrons within the equatorial source region: 1-D PIC simulations10.1002/2017JA024850 ↗
19. Whistler anisotropy instability at low electron: Particle-in-cell simulations10.1063/1.3610378 ↗
20. The effects of thermal electrons on whistler mode waves excited by anisotropic hot electrons: Linear theory and 2-D PIC simulations10.1029/2019ja026463 ↗
21. Statistical results of the power gap between lower-band and upper-band chorus waves10.1029/2019GL082140 ↗
22. Excitation of banded whistler waves in the magnetosphere10.1029/2011GL048375 ↗
23. Origin of two-band chorus in the radiation belt of Earth10.1038/s41467-019-12561-3 ↗
24. Gap formation around Ωe/2 and generation of low-band whistler waves by Landau-resonant electrons in the magnetosphere: Predictions from dispersion theory10.26464/epp2020020 ↗
25. Lower band cascade of whistler waves excited by anisotropic hot electrons: One-dimensional PIC simulations10.1002/2017JA024513 ↗
26. Unraveling the correlation between chorus wave and electron beam-like distribution in the Earth’s magnetosphere10.1029/2019GL085108 ↗
27. New evidence for generation mechanisms of discrete and hiss-like whistler mode waves10.1002/2014GL060707 ↗
28. The relationship between the macroscopic state of electrons and the properties of chorus waves observed by the Van Allen probes10.1002/2016GL070084 ↗
29. PDRK: A general kinetic dispersion relation solver for magnetized plasma10.1088/1009-0630/18/2/01 ↗
30. Analysis of chorus emissions at Jupiter10.1029/JA089iA06p03801 ↗
31. Nonlinear mechanisms of lower-band and upper-band VLF chorus emissions in the magnetosphere10.1029/2009JA014206 ↗
32. Nonlinear damping of oblique whistler mode waves via Landau resonance10.1029/2018JA025848 ↗
33. Temperature anisotropy and beam type whistler instabilities10.1063/1.861342 ↗
34. Two-band whistler-mode waves excited by an electron bi-maxwellian distribution plus parallel beams: 1D PIC data10.12176/01.99.00158 ↗