Results 11 to 20 of about 1,162 (146)
Geophysical Research Letters, 2023 Results from a 1D kinetic simulation, for the first time, reveal the important role of modified electron acoustic wave (MEAW) in auroral electron acceleration.
Run Shi +4 more
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Non-linear spherical Alfvén waves
Monthly Notices of the Royal Astronomical Society, 1998 We present an one-dimensional numerical study of Alfven waves propagating along a radial magnetic field. Neglecting losses, any spherical Alfven wave, no matter how small its initial amplitude is, becomes nonlinear at sufficiently large radii. From previous simulations of Alfven waves in plane parallel atmospheres we did expect the waves to steepen and
Torkelsson, Ulf, Boynton, G. Christopher
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Nonlinear Interaction of Low-frequency Alfvén Waves and Ions
The Astrophysical Journal, 2023 The interaction between Alfvén waves and particles is a critical phenomenon in space and laboratory plasmas, and it has been observed that low-frequency Alfvén waves can accelerate and heat ions through subharmonic resonant interactions.
Xianshu Wu +4 more
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Alfvén‐Fast Wave Coupling in a 2D Nonuniform Medium
Earth and Space Science, 2023 A 2D Cartesian simulation is presented and used to solve the ideal, low‐beta, linear magnetohydrodynamics equations. A simulation is used to investigate the propagation of Alfvén waves through inhomogeneities in Alfvén speed and density.
R. Davies, A. N. Wright
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Phase Mixing of Propagating Alfvén Waves in a Single-fluid Partially Ionized Solar Plasma
The Astrophysical Journal, 2023 The phase mixing of Alfvén waves is one of the most promising mechanisms for the heating of the solar atmosphere. The damping of waves in this case requires small transversal scales, relative to the magnetic field direction; this requirement is achieved ...
M. McMurdo +4 more
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Penetration to the Earth's surface of standing Alfvén waves excited by external currents in the ionosphere [PDF]
Annales Geophysicae, 1996 The problem of boundary conditions for monochromatic Alfvén waves, excited in the magnetosphere by external currents in the ionospheric E-layer, is solved analytically. Waves with large azimuthal wave numbers m»1 are considered.
A. S. Leonovich, V. A. Mazur
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Coupling Between Alfvén Wave and Kelvin–Helmholtz Waves in the Low Latitude Boundary Layer
Frontiers in Astronomy and Space Sciences, 2022 The Kelvin–Helmholtz (KH) instability of magnetohydrodynamic surface waves at the low latitude boundary layer is examined using both an eigenfrequency analysis and a time-dependent wave simulation.
E.-H. Kim, J. R. Johnson, K. Nykyri
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Ion acceleration by parallel propagating nonlinear Alfvén wave packets in a radially expanding plasma [PDF]
Nonlinear Processes in Geophysics, 2014 The numerical simulation of the nonlinear evolution of the parallel propagating Alfvén waves in a radially expanding plasma is performed by using a kinetic-fluid model (the Vlasov–MHD model). In our study, both the nonlinear evolution of the Alfvén waves
Y. Nariyuki +3 more
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Ion‐Scale Kinetic Alfvén Turbulence: MMS Measurements of the Alfvén Ratio in the Magnetosheath
Geophysical Research Letters, 2018 Turbulence in the Earth's magnetosheath at ion kinetic scales is investigated with the magnetospheric multiscale spacecraft. Several possibilities in the wave paradigm have been invoked to explain plasma turbulence at ion kinetic scales such as kinetic ...
O. W. Roberts +12 more
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Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.Abstract Ultra‐low‐frequency (ULF) waves cause local Thermosphere‐Ionosphere (T‐I) perturbations, but their impacts on the global T‐I system including the generation of Traveling Atmospheric Disturbances (TADs) have never been evaluated. The mechanisms responsible for the TAD generation and propagation, whether through dynamic or thermal process, are ...
Haonan Wu +6 more
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