Results 71 to 80 of about 11,735 (263)

Chromospheric Damping of Alfven Waves

The Astrophysical Journal, 2001
We analytically study the damping of Alfven mode oscillations in the chromosphere and in coronal loops. In the partially ionized chromosphere the dominant damping process of Alfven waves is due to collisions between ions and neutrals. We calculate the damping time for Alfven waves of a given frequency, propagating through model chromospheres of various
B. De Pontieu, P. C. H. Martens, H. S. Hudson   +2 more
openaire   +1 more source

Evidence for a Localized Burst of Relativistic Electrons Produced in Earth's Plasma Sheet During a Substorm

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract Earth's magnetotail and its plasma sheet are highly dynamic, influenced by both the solar wind and the inner magnetosphere. Periodically, energy is explosively released in the magnetotail during substorms. However, the extent to which electrons are accelerated in the magnetotail remains an open question, with recent observations revealing ...
M. Shumko, D. L. Turner, A. Y. Ukhorskiy, I. J. Cohen, G. K. Stephens, A. Artemyev, X. Zhang, C. Wilkins, E. Tsai, C. Gabrielse, S. Raptis, M. Sitnov, V. Angelopoulos   +12 more
wiley   +1 more source

Parker Solar Probe Observations of Proton Core‐Beam Distributions in Heliospheric Current Sheet Region: Quasilinear Instability Analysis Combined With Collisional Relaxation

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract Parker Solar Probe has been proven as instrumental for the observation of young solar wind. During the encounters E‐07 and E‐08, PSP recorded the core plus beaming protons crossing the heliospheric current Sheet region. When the observed PSP data is plotted in the temperature ratio versus parallel beta space, it is found that the occurrence ...
M. Rashid, P. H. Yoon, J. Huang, C. Salem, M. Sarfraz, S. Alnussirat, R. A. López, J. Seough, H. Xie, D. Larson, R. Livi   +10 more
wiley   +1 more source

Force-free Wave Interaction in Magnetar Magnetospheres: Computational Modeling in Axisymmetry

The Astrophysical Journal
Crustal quakes of highly magnetized neutron stars can disrupt their magnetospheres, triggering energetic phenomena like X-ray and fast radio bursts. Understanding plasma wave dynamics in these extreme environments is vital for predicting energy transport
Jens F. Mahlmann, Miguel Á. Aloy, Xinyu Li   +2 more
doaj   +1 more source

Clockwise and counter clockwise 6 & 9 year geostrophic MC (& Rossby) waves in centre of the mechanism of geomagnetic jerks and relevant LODs

Contributions to Geophysics and Geodesy, 2022
Versus the theory of fully stochastically mechanism of geomagnetic jerks based on the buoyant force driven Quasi-Geostrophic (QG) dynamo, the torsional waves in realistic condition of the Earth's core evolve in the intradecadal time scales.
Mohsen LUTEPHY, Botir Berdiyorovich ISMAILOV, Adnan Hashim ABDULKADHIM   +2 more
doaj   +1 more source

Roles of Fast-Cyclotron and Alfven-Cyclotron Waves for the Multi-Ion Solar Wind

, 2012
Using linear Vlasov theory of plasma waves and quasi-linear theory of resonant wave-particle interaction, the dispersion relations and the electromagnetic field fluctuations of fast and Alfven waves are studied for a low-beta multi-ion plasma in the ...
A. Barnes, A. Osmane, B.D. Chandran, B.E. Goldstein, B.T. MacBride, C.W. Smith, E. Marsch, E. Marsch, E.N. Parker, F. Sahraoui, F. Sahraoui, G. Gogoberidze, J. He, J.C. Perez, J.J. Podesta, J.L. Kohl, J.V. Hollweg, M. Neugebauer, M. Neugebauer, Ming Xiong, P. Goldreich, P.A. Isenberg, R.J. Leamon, R.T. Wicks, S. Dasso, S.A. Markovskii, S.A. Markovskii, S.D. Bale, S.P. Gary, S.P. Gary, S.P. Gary, S.P. Gary, S.R. Cranmer, S.R. Cranmer, T.H. Stix, T.S. Horbury, W.A. Coles, W.H. Matthaeus, W.I. Axford, X. Li, X. Li, X. Li, Xing Li   +42 more
core   +1 more source

Simulations of Incompressible MHD Turbulence [PDF]

, 2000
We simulate incompressible MHD turbulence in the presence of a strong background magnetic field. Our major conclusions are: 1) MHD turbulence is most conveniently described in terms of counter propagating shear Alfven and slow waves.
Goldreich, Peter, Maron, Jason
core   +4 more sources

The Contribution of Time Domain Structures to Electron Loss During the 17 March 2013 Geomagnetic Storm

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract Ring current modeling has been a subject of active research in the last two decades. However, accurately modeling of this population of particles remains a challenge. Several recent studies have demonstrated that ring current models can overestimate the trapped electron flux in the 10–50 keV range by up to two orders of magnitude during ...
Katja Stoll, Yangyang Shen, Bernhard Haas, Leonie Pick, Dedong Wang, Yuri Shprits   +5 more
wiley   +1 more source

Second-order perturbations in Alfvén waves in cold plasma approximation

Solar-Terrestrial Physics, 2019
The second-order amplitude perturbations driven by Alfvén waves are studied. Equations for such second-order perturbations are derived and their solutions are found. The second-order perturbations are shown to be generated by the magnetic pressure of the
Dmitrienko I.S.
doaj   +1 more source

On the Escape of Low-frequency Waves from Magnetospheres of Neutron Stars

The Astrophysical Journal, 2023
We study the nonlinear decay of the fast magnetosonic (fms) into the Alfvén waves in relativistic force-free magnetohydrodynamics. The work has been motivated by models of pulsar radio emission and fast radio bursts (FRBs), in which the emission is ...
Ephim Golbraikh, Yuri Lyubarsky
doaj   +1 more source