Results 91 to 100 of about 32,327 (219)

A new model for heating of Solar North Polar Coronal Hole

, 2015
This paper presents a new model of North Polar Coronal Hole (NPCH) to study dissipation/propagation of MHD waves. We investigate the effects of the isotropic viscosity and heat conduction on the propagation characteristics of the MHD waves in NPCH.
Devlen, E., Pekünlü, E. R., Yardımcı, M., Çamurdan, D. Zengin   +3 more
core  

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

Seismic Halos Around Active Regions: An MHD Theory

, 2008
Comprehending the manner in which magnetic fields affect propagating waves is a first step toward constructing accurate helioseismic models of active region sub-surface structure and dynamics.
Gizon L., Nagashima K., Pneuman G. W., Shravan M. Hanasoge   +3 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

Cosmic Ray Scattering in Compressible Turbulence

, 2006
We study the scattering of low-energy Cosmic Rays (CRs) in a turbulent, compressive MHD fluid. We show that compressible MHD modes -- fast or slow waves with wave lengths smaller than CR mean free paths induce cyclotron instability in CRs.
A. Beresnyak, A. Lazarian, Barnes, Beresnyak, Bieber, Biskamp, Boldyrev, Boldyrev, Brunetti, Cassano, Chandran, Chew, Cho, Cho, Cho, Cho, Cho, Cho, Esslin, Farmer, Gary, Ginzburg, Goldreich, Higdon, Jokipii, Kaplan, Kulsrud, Kulsrud, Lazarian, Lazarian, Lerche, Lithwick, Longair, Maron, Melrose, Mikhailovskii, Müller, Müller, Petrosian, Sagdeev, Schekochihin, Schlickeiser, Shalchi, Shebalin, Yan, Yan, Zank   +46 more
core   +1 more source

ULF Wave Modulation of Energetic Electron Precipitation Caused by the Self‐Limiting of Space Radiation: May 2024 Superstorm Observations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract The May 2024 geomagnetic superstorm provided the opportunity to explore how strong wave‐particle interactions affect energetic electron precipitation under intense driving. Using coordinated measurements from a balloon‐borne Timepix‐based X‐ray detector, ground‐based riometers and magnetometers, and Arase satellite observations, we identified ...
L. Olifer, D. Zhou, M. Patel, I. R. Mann, M. K. Hudson, A. W. Degeling, C. O. Heinke, G. R. Sivakoff, A. Kale, S. Kasahara, S. Yokota, K. Keika, T. Hori, T. Mitani, T. Takashima, Y. Kasahara, S. Matsuda, A. Shinbori, A. Matsuoka, M. Teramoto, K. Yamamoto, I. Shinohara, Y. Miyoshi   +22 more
wiley   +1 more source

MHD waves in the pre-front region of the interplanetary shock on May 10, 2024

Solar-Terrestrial Physics
The article reports on the study of the dynamics of the IMF turbulent component from the quiet period on May 7, 2024 to the arrival of an interplanetary shock wave in the second half of May 10, 2024.
Starodubtsev Sergei
doaj   +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

Generalised global symmetries in holography: magnetohydrodynamic waves in a strongly interacting plasma

Journal of High Energy Physics, 2019
We begin the exploration of holographic duals to theories with generalised global (higher-form) symmetries. In particular, we focus on the case of magnetohydrodynamics (MHD) in strongly coupled plasmas by constructing and analysing a holographic dual to ...
Sašo Grozdanov, Napat Poovuttikul
doaj   +1 more source

Magneto-seismology of solar atmospheric loops by means of longitudinal oscillations

, 2012
There is increasingly strong observational evidence that slow magnetoacoustic modes arise in the solar atmosphere. Solar magneto-seismology is a novel tool to derive otherwise directly un-measurable properties of the solar atmosphere when ...
Dymova, G. Verth, M. Luna-Cardozo, R. Erdélyi, Verth   +4 more
core   +1 more source