Results 41 to 50 of about 9,065 (177)

Observations of the Magnetopause Reconnection Ion Diffusion Region With High‐Density O+ Ions During the May 2024 Superstorm

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Based on high‐resolution measurements from NASA's Magnetospheric Multiscale mission (MMS), we present the first direct observation of an ion diffusion region (IDR) with high number density O+ ions within dayside magnetopause reconnection during the May 2024 superstorm. The O+ ion density reaches a high value of ∼3.3 cm−3.
Anxin Zhang, Suping Duan, Lei Dai, Yuntian Hou, Yong Ren, Chi Wang, S. A. Fuselier, C. Philippe Escoubet, James L. Burch   +8 more
wiley   +1 more source

Alfvén Wave Conversion to Low Frequency Fast Magnetosonic Waves in Magnetar Magnetospheres

The Astrophysical Journal
Rapid shear motion of magnetar crust can launch Alfvén waves into the magnetosphere. The dissipation of the Alfvén waves has been theorized to power the X-ray bursts characteristic of magnetars.
Dominic Bernardi, Yajie Yuan, Alexander Y. Chen   +2 more
doaj   +1 more source

Multi-Component MHD Model of Hot Jupiter Envelopes

Universe, 2021
A numerical model description of a hot Jupiter extended envelope based on the approximation of multi-component magnetic hydrodynamics is presented. The main attention is focused on the problem of implementing the completed MHD stellar wind model.
Andrey Zhilkin, Dmitri Bisikalo
doaj   +1 more source

Nonlinear Gyrokinetic Simulation of the Magnetosphere‐Ionosphere Feedback Coupling

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract A nonlinear gyrokinetic simulation is applied to the magnetosphere‐ionosphere (M‐I) coupling system to investigate spontaneous growth of auroral structures and electron acceleration self‐consistently. Perturbations of electron density, potential and field‐aligned current in the auroral ionosphere develop through the feedback instability ...
T.‐H. Watanabe, K. Fujita, S. Maeyama
wiley   +1 more source

Shell-models of RMHD turbulence and the heating of solar coronal loops [PDF]

, 2006
A simplified non-linear numerical model for the development of incompressible magnetohydrodynamics (MHD) in the presence of a strong magnetic field B0 and stratification, nicknamed Shell-Atm, is presented.
E. Buchlin, Isliker H., Klein L. W., M. Velli, Shebalin J. V., Velli M., Vlahos L.   +6 more
core   +2 more sources

Alfvén Wave Mode Conversion in Neutron Star Magnetospheres: A Semianalytic Approach

The Astrophysical Journal
We write down the force-free electrodynamics equations in dipole coordinates and solve for axisymmetric normal modes corresponding to Alfvénic perturbations in the magnetosphere of a neutron star.
Alexander Y. Chen, Yajie Yuan, Dominic Bernardi   +2 more
doaj   +1 more source

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

Astronomy & 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., Van Doorsselaere T., Magyar N., Banović L., Lim D.   +4 more
doaj   +1 more source

Dataset of Quiet Space Weather Periods for Ionospheric Studies

Earth and Space Science, Volume 13, Issue 4, April 2026.
Abstract The ionosphere is a dynamic environment regularly affected from above and from below. This study identifies periods within the years 2000–2023 when the impact from above, driven by space weather, was minimal. The quiet space weather periods have wide usage for two types of ionospheric studies. At first, studies of isolated space weather events
Šimon Mackovjak, Silvia Kostárová, Jaroslav Chum, Carsten Schmidt, Patrick Hannawald, Sabine Wüst, Lisa Küchelbacher, Vladimír Truhlík, Petra Koucká Knížová, Jaroslav Urbář, Lukáš Randuška, Filip Štempel, Ján Kubančák   +12 more
wiley   +1 more source

Coupling the solar surface and the corona: coronal rotation, Alfv\'en wave-driven polar plumes

, 2013
The dynamical response of the solar corona to surface and sub-surface perturbations depends on the chromospheric stratification, and specifically on how efficiently these layers reflect or transmit incoming Alfv\'en waves.
Grappin, R., Pinto, R. F., Velli, M., Verdini, A.   +3 more
core   +1 more source

Quantum Treatment of Kinetic Alfvén Waves Instability in a Dusty Plasma: Magnetized Ions

Advances in High Energy Physics, 2016
Kinetic Alfvén wave instability is examined rigorously in a uniform nondegenerate quantum dusty plasma. A linear dispersion relation of kinetic Alfvén wave in inertial regime is derived by incorporating Bohm potential in the linearized Vlasov model.
N. Rubab, G. Jaffer
doaj   +1 more source