Results 61 to 70 of about 10,009 (174)

Alfvén wave evolution into magnetic filaments in 3-D space plasma

Earth, Planets and Space, 2020
Nonlinearities in space and astrophysical plasmas generate a set of magnetic filaments or bundles that have an incompressible sense of fluctuations and propagate highly obliquely to the mean magnetic field.
Horia Comişel, Yasuhito Narita, Uwe Motschmann   +2 more
doaj   +1 more source

The Effect of the Parametric Decay Instability on the Morphology of Coronal Type III Radio Bursts

The Astrophysical Journal Letters, 2023
The nonlinear evolution of Alfvén waves in the solar corona leads to the generation of Alfvénic turbulence. This description of the Alfvén waves involves parametric instabilities where the parent wave decays into slow mode waves giving rise to density ...
Chaitanya Prasad Sishtla, Immanuel Christopher Jebaraj, Jens Pomoell, Norbert Magyar, Marc Pulupa, Emilia Kilpua, Stuart D. Bale   +6 more
doaj   +1 more source

Heating of the Solar Chromosphere and Corona by Alfven Wave Turbulence

, 2011
A three-dimensional MHD model for the propagation and dissipation of Alfven waves in a coronal loop is developed. The model includes the lower atmospheres at the two ends of the loop.
A. A. van Ballegooijen, Alfvén, Antolin, Aschwanden, Aschwanden, Aschwanden, Avrett, Berger, Berger, Berger, Berger, Bhattacharjee, Bhattacharjee, Brosius, Buchlin, Carlsson, Cattaneo, Chae, Chandran, Chandran, Chandrasekhar, Cho, Cranmer, Cranmer, Cranmer, De Pontieu, De Pontieu, Dmitruk, Dmitruk, Dmitruk, Dmitruk, E. E. DeLuca, Erdélyi, Fontenla, Fontenla, Fontenla, Furusawa, Galloway, Goldreich, Gudiksen, Hasan, Heyvaerts, Heyvaerts, Judge, Kadomtsev, Klimchuk, Klimchuk, Li, López Fuentes, M. Asgari-Targhi, Mandrini, Martens, Martens, Martinez-Sykora, Matsumoto, Matthaeus, McIntosh, Montgomery, Ofman, Parker, Press, Priest, Rappazzo, Rappazzo, Roberts, Rouppe van der Voort, Rutten, S. R. Cranmer, Sakai, Schekochihin, Schrijver, Schrijver, Spruit, Stein, Ugarte-Urra, Ulmschneider, van Ballegooijen, van Ballegooijen, Verdini, Verdini, Warren, Wilmot-Smith, Winebarger   +82 more
core   +1 more source

Standing sausage modes in coronal loops with plasma flow [PDF]

, 2014
Magnetohydrodynamic waves are important for diagnosing the physical parameters of coronal plasmas. Field-aligned flows appear frequently in coronal loops.We examine the effects of transverse density and plasma flow structuring on standing sausage modes ...
Chen, Shao-Xia, Li, Bo, Xia, Li-Dong, Yu, Hui   +3 more
core   +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

Analysis of Magnetic Fields in Inertial Alfven Wave Collisions

, 2014
Turbulence in astrophysical and space plasmas is dominated by the nonlinear interaction of counterpropagating Alfven waves. Most Alfven wave turbulence theories have been based on ideal plasma models, such as incompressible MHD, for Alfven waves at large
Carter, Troy A., Dorfman, Seth, Drake, Dereth J., Howes, Gregory G., Kletzing, Craig A., Schroeder, James W. R., Shanken, Brian C., Skiff, Frederick   +7 more
core   +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

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

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

Journal 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, Tomas Karlsson, Sofia Bergman   +2 more
wiley   +1 more source

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

Journal 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, Eunjin Choi, Kyoung‐Joo Hwang, Kyunghwan Dokgo   +3 more
wiley   +1 more source