Results 21 to 30 of about 829 (220)

Comparative Study of Dayside Pulsating Auroras Induced by Ultralow-Frequency Waves

open access: yesUniverse, 2023
Pulsating auroras are usually observed with ultralow-frequency (ULF) waves in the Pc 3–5 band (period 10–600 s). These auroras are thought to result from interactions between energetic electrons and chorus waves, but their relationship with ULF waves ...
Xing-Yu Li   +13 more
doaj   +1 more source

Generation of Realistic Short Chorus Wave Packets

open access: yesGeophysical Research Letters, 2021
AbstractMost lower‐band chorus waves observed in the inner magnetosphere propagate under the form of moderately intense short wave packets with fast frequency and phase variations. Therefore, understanding the formation mechanism of such short wave packets is crucial for accurately modeling electron nonlinear acceleration or precipitation into the ...
D. Nunn   +3 more
openaire   +1 more source

Observations and modeling of forward and reflected chorus waves captured by THEMIS [PDF]

open access: yesAnnales Geophysicae, 2011
Discrete ELF/VLF chorus emissions are the most intense electromagnetic plasma waves observed in the radiation belts of the Earth's magnetosphere. Chorus emissions, whistler-mode wave packets propagating roughly along magnetic field lines from a well ...
O. Agapitov   +7 more
doaj   +1 more source

Connection Between Chorus Wave Amplitude and Background Magnetic Field Inhomogeneity: A Parametric Study

open access: yesGeophysical Research Letters, 2023
Whistler mode chorus waves frequently appear as discrete, repetitive, and quasi‐monochromatic emissions with frequency chirping. With different wave amplitude and frequency chirping rate, chorus waves have been observed not only in the magnetosphere of ...
Zeyin Wu   +5 more
doaj   +1 more source

Backward-propagating source as a component of rising tone whistler-mode chorus generation

open access: yesFrontiers in Astronomy and Space Sciences, 2022
Whistler-mode chorus waves in the magnetosphere play a crucial role in space weather via wave–particle interactions. The past two decades have observed tremendous advances in theory and simulations of chorus generation; however, several details of the ...
Vijay Harid   +3 more
doaj   +1 more source

Plasmaspheric High‐Frequency Whistlers as a Candidate Cause of Shock Aurora at Earth

open access: yesGeophysical Research Letters, 2023
Auroral brightening driven by interplanetary shocks on Earth's closed magnetic field lines is commonly attributed to the 0.1–10 keV electron precipitations by electron cyclotron harmonic waves and whistler‐mode chorus waves in the low‐density region.
Nigang Liu   +7 more
doaj   +1 more source

Chorus Wave Modulation of Langmuir Waves in the Radiation Belts [PDF]

open access: yesGeophysical Research Letters, 2017
AbstractUsing high‐resolution waveforms measured by the Van Allen Probes, we report a novel observation in the radiation belts. Namely, we show that multiband, discrete, rising‐tone whistler mode chorus emissions exhibit a one‐to‐one correlation with Langmuir wave bursts.
Jinxing Li   +9 more
openaire   +1 more source

The relationship between the macroscopic state of electrons and the properties of chorus waves observed by the Van Allen Probes

open access: yesGeophysical Research Letters, 2016
Plasma kinetic theory predicts that a sufficiently anisotropic electron distribution will excite whistler mode waves, which in turn relax the electron distribution in such a way as to create an upper bound on the relaxed electron anisotropy.
Chao Yue   +9 more
doaj   +1 more source

Electron acceleration at Jupiter: input from cyclotron-resonant interaction with whistler-mode chorus waves [PDF]

open access: yesAnnales Geophysicae, 2013
Jupiter has the most intense radiation belts of all the outer planets. It is not yet known how electrons can be accelerated to energies of 10 MeV or more.
E. E. Woodfield   +6 more
doaj   +1 more source

Relativistic Microburst Scale Size Induced by a Single Point‐Source Chorus Element

open access: yesGeophysical Research Letters, 2022
Relativistic microbursts are impulsive, sub‐second precipitation bursts of relativistic electrons. They are one of the main loss mechanisms of outer radiation belt electrons, and are driven by chorus waves.
Ning Kang   +4 more
doaj   +1 more source

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