Observation of Oblique Lower Band Chorus Generated by Nonlinear Three-Wave Interaction
- Univ. of Science and Technology of China, Hefei (China); Collaborative Innovation Center of Astronautical Science and Technology (China)
- Chinese Academy of Sciences (CAS), Nanjing (China). Purple Mountain Observatory
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Space Sciences Division and the New Mexico Consortium, Los Alamos, NM (United States)
Oblique whistler mode waves have been suggested to play an important role in radiation belt electron dynamics. Recently, Fu et al. [2017] proposed that highly oblique lower band whistler waves could be generated by nonlinear three-wave resonance. Here we present the first observational evidence of such process, using Van Allen Probes data, where an oblique lower band chorus wave is generated by two quasi-parallel waves through nonlinear three-wave interaction. The wave resonance condition is satisfied even in the presence of frequency chirping of one of the pump waves. Different from the simulation results of Fu et al. [2017], simultaneous particle data do not show a plateau in the electron distribution, which could be due to the very weak intensity of the generated waves. These results should help to better understand the generation of oblique waves in the inner magnetosphere and their relative roles in energetic electron dynamics.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- NASA; USDOE
- Grant/Contract Number:
- 89233218CNA000001
- OSTI ID:
- 1558059
- Report Number(s):
- LA-UR--18-31204
- Journal Information:
- Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 13 Vol. 45; ISSN 0094-8276
- Publisher:
- American Geophysical UnionCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Nonlinear Coupling Between Whistler‐Mode Chorus and Electron Cyclotron Harmonic Waves in the Magnetosphere
|
journal | December 2018 |
Excitation of Highly Oblique Lower Band and Upper Band Chorus by a Loss Cone Feature and Temperature Anisotropy Distribution
|
journal | February 2019 |
Low-frequency hiss-like whistler-mode waves generated by nonlinear three-wave interactions outside the plasmasphere
|
journal | December 2019 |
Similar Records
Unraveling the excitation mechanisms of highly oblique lower-band chorus waves
Oblique instability of quasi-parallel whistler waves in the presence of cold and warm electron populations