Results 81 to 90 of about 11,735 (263)

Resonant magnetohydrodynamic waves in high-beta plasmas [PDF]

open access: yes, 2009
When a global magnetohydrodynamic (MHD) wave propagates in a weakly dissipative inhomogeneous plasma, the resonant interaction of this wave with either local Alfven or slow MHD waves is possible. This interaction occurs at the resonant position where the
Ruderman, M.S.
core   +1 more source

Statistical Study of Short Large‐Amplitude Magnetic Structures at Mars Observed by MAVEN

open access: yesJournal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract We present a statistical study of Short Large‐Amplitude Magnetic Structures (SLAMS) in the Martian foreshock using data from the Mars Atmosphere and Volatile Evolution (MAVEN) mission between 01 January 2015 and 31 December 2019. We have identified 21,008 SLAMS during this time interval and statistical results are presented on the SLAMS ...
Tsz Kiu Wong Chan   +2 more
wiley   +1 more source

Alfvén Wave Conversion and Reflection in the Solar Chromosphere and Transition Region

open access: yesPhysics, 2022
Series solutions are used to explore the mode conversion of slow, Alfvén and fast magnetohydrodynamic waves injected at the base of a two-isothermal-layer stratified atmosphere with a uniform magnetic field, crudely representing the solar chromosphere ...
Paul Cally
doaj   +1 more source

Cosmological Alfv\'en waves in the recent CMB data, and the observational bound on the primordial vector perturbation

open access: yes, 2009
In the presence of the primordial magnetic field, initial vector (vorticity) perturbations produce cosmological Alfven waves and leave imprints on cosmic microwave background (CMB) temperature and polarization anisotropy. We have investigated imprints of
Kim, Jaiseung, Naselsky, Pavel
core   +1 more source

Weakly Turbulent MHD Waves in Compressible Low-Beta Plasmas [PDF]

open access: yes, 2008
In this Letter, weak turbulence theory is used to investigate interactions among Alfven waves and fast and slow magnetosonic waves in collisionless low-beta plasmas.
Benjamin D. G. Chandran   +4 more
core   +1 more source

Reconstruction of Two‐Dimensional Magnetohydrodynamic and Hall Magnetohydrodynamic Equilibria in Space Using Physics‐Informed Neural Networks

open access: yesJournal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 2, April 2026.
Abstract We present a novel data analysis technique based on physics‐informed neural networks (PINNs) to reconstruct two‐dimensional (2D) magnetohydrodynamic (MHD) and Hall MHD equilibria in a space plasma from in situ spacecraft measurements. Our method incorporates the steady‐state MHD or Hall MHD equations—a set of partial differential equations ...
Hiroshi Hasegawa   +3 more
wiley   +1 more source

The Uniturbulence and Alfvén Wave Solar Model (UAWSoM) in MPI-AMRVAC

open access: yesAstronomy & Astrophysics
Context. The coronal heating problem and the generation of the solar wind remain fundamental challenges in solar physics. While approaches based on, e.g., the Alfvén Wave Solar Model (AWSoM) have proven highly successful in reproducing the large-scale ...
McMurdo M.   +4 more
doaj   +1 more source

On the Conservation of Cross Helicity and Wave Action in Solar-Wind Models with Non-WKB Alfven Wave Reflection [PDF]

open access: yes, 2015
The interaction between Alfven-wave turbulence and the background solar wind affects the cross helicity in two ways. Non-WKB reflection converts outward-propagating Alfven waves into inward-propagating Alfven waves and vice versa, and the turbulence ...
Chandran, Benjamin D. G.   +4 more
core   +2 more sources

Global Energy Circulation During a Solar Wind Density Pulse

open access: yesSpace Weather, Volume 24, Issue 4, April 2026.
Abstract We study the propagation and impacts of a strong density pulse through the magnetosphere during 11:40–12:00 UT near the peak of a geomagnetic storm on 3 February 2022. Using the Space Weather Modeling Framework Geospace global simulation, we show how the energy transport in the magnetosphere is enhanced promptly after the pulse arrival at the ...
Tuija Pulkkinen   +5 more
wiley   +1 more source

A developed stage of Alfven wave phase mixing [PDF]

open access: yes, 2000
Alfven wave phase mixing is an extensively studied mechanism for dissipating wave energy in an inhomogeneous medium. It is common in the vast majority of phase mixing papers to assume that even though short scale lengths and steep gradients develop as a ...
Arber, Tony   +3 more
core  

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