Direct Observational Evidence of the Simultaneous Excitation of Electromagnetic Ion Cyclotron Waves and Magnetosonic Waves by an Anisotropic Proton Ring Distribution

2021 ◽  
Vol 48 (8) ◽  
Author(s):  
S. Teng ◽  
N. Liu ◽  
Q. Ma ◽  
X. Tao ◽  
W. Li
Keyword(s):  
Observational Evidence ◽  
Simultaneous Excitation ◽  
Ion Cyclotron Waves ◽  
Ion Cyclotron ◽  
Electromagnetic Ion Cyclotron Waves

Direct Observational Evidence of the Simultaneous Excitation of Electromagnetic Ion Cyclotron Waves and Magnetosonic Waves by an Anisotropic Proton Ring Distribution

2021 ◽  
Author(s):  
Shangchun Teng ◽  
Nigang Liu ◽  
Qianli Ma ◽  
Xin Tao ◽  
Wen Li
Keyword(s):  
Energetic Electron ◽  
Observational Evidence ◽  
Ion Dynamics ◽  
Frequency Spectra ◽  
Simultaneous Excitation ◽  
Proton Distribution ◽  
Ion Cyclotron ◽  
Electromagnetic Ion Cyclotron Waves ◽  
Generation Mechanisms ◽  
Emic Waves

<p>Magnetosonic (MS) waves and electromagnetic ion cyclotron (EMIC) waves are two important plasma wave modes in the magnetosphere. Previous simulations have shown that both waves could be generated by a ring-like proton distribution, while direct observational evidence has yet to be reported. Here, we present simultaneous observations of MS and EMIC waves and a detailed case analysis. The linear growth rates estimated for both waves are in good agreement with the observed wave frequency spectra. The measured proton distribution evolution is also compared with the simulation results, providing direct observational evidence for the previous theoretical prediction that anisotropic ring-like proton distributions could excite MS and EMIC waves simultaneously. Our findings are crucial for understanding the generation mechanisms of and relation between MS and EMIC waves and for evaluating their combined effects on energetic electron and ion dynamics. </p>

scholarly journals MMS Observations of Harmonic Electromagnetic Ion Cyclotron Waves

2018 ◽  
Vol 45 (17) ◽  
pp. 8764-8772 ◽  
Author(s):  
M. E. Usanova ◽  
N. Ahmadi ◽  
D. M. Malaspina ◽  
R. E. Ergun ◽  
K. J. Trattner ◽  
...  
Keyword(s):  
Ion Cyclotron Waves ◽  
Ion Cyclotron ◽  
Electromagnetic Ion Cyclotron Waves

scholarly journals Ion Heating by Electromagnetic Ion Cyclotron Waves and Magnetosonic Waves in the Earth's Inner Magnetosphere

2019 ◽  
Vol 46 (12) ◽  
pp. 6258-6267 ◽  
Author(s):  
Q. Ma ◽  
W. Li ◽  
C. Yue ◽  
R. M. Thorne ◽  
J. Bortnik ◽  
...  
Keyword(s):  
Ion Heating ◽  
Inner Magnetosphere ◽  
Ion Cyclotron Waves ◽  
Ion Cyclotron ◽  
Electromagnetic Ion Cyclotron Waves

MMS Measurements and Modeling of Peculiar Electromagnetic Ion Cyclotron Waves

2019 ◽  
Vol 46 (21) ◽  
pp. 11622-11631
Author(s):  
Justin H. Lee ◽  
Drew L. Turner ◽  
Sergio Toledo‐Redondo ◽  
Sarah K. Vines ◽  
Robert C. Allen ◽  
...  
Keyword(s):  
Ion Cyclotron Waves ◽  
Ion Cyclotron ◽  
Electromagnetic Ion Cyclotron Waves
Sign in / Sign up

Export Citation Format

Share Document