Results 51 to 60 of about 8,815 (178)

Connecting the Sun and the Solar Wind: The First 2.5 Dimensional Self-consistent MHD Simulation under the Alfv\'en Wave Scenario

open access: yes, 2012
The solar wind emanates from the hot and tenuous solar corona. Earlier studies using 1.5 dimensional simulations show that Alfv\'{e}n waves generated in the photosphere play an important role in coronal heating through the process of non-linear mode ...
Antolin   +28 more
core   +1 more source

Strong Energy Conversion by a Magnetic Hole Behind a Dipolarization Front

open access: yesGeophysical Research Letters, Volume 52, Issue 8, 28 April 2025.
Abstract Dipolarization fronts (DFs) have been widely reported in the Earth's magnetotail and are suggested to play an important role in energy conversion. Magnetic holes (MHs) are also usually observed near DFs, and recent spacecraft observations suggest that they can be excited by interchange instability (ICI). However, whether the MHs near DFs could
Z. Y. Xu   +7 more
wiley   +1 more source

Neural network prediction of geomagnetic activity: a method using local H\"{o}lder exponents

open access: yes, 2004
Local scaling and singularity properties of solar wind and geomagnetic time series were analysed using H\"{o}lder exponents $\alpha$. It was shown that in analysed cases due to multifractality of fluctuations $\alpha$ changes from point to point.
Jankovičová, D., Vörös, Z.
core   +1 more source

Sunward-propagating Alfv\'enic fluctuations observed in the heliosphere [PDF]

open access: yes, 2016
The mixture/interaction of anti-sunward-propagating Alfv\'enic fluctuations (AFs) and sunward-propagating Alfv\'enic fluctuations (SAFs) is believed to result in the decrease of the Alfv\'enicity of solar wind fluctuations with increasing heliocentric ...
Belcher, J. W.   +4 more
core   +3 more sources

Control of the Jovian Magnetopause by Iogenic Plasma: Initial Results From Global MHD Simulations

open access: yesGeophysical Research Letters, Volume 52, Issue 7, 16 April 2025.
Abstract The size and variability of Jupiter's magnetosphere are not only determined by upstream conditions but also substantially influenced by internal processes within Jupiter's magnetosphere, specifically the dynamics of the rotation magnetodisc.
Enhao Feng   +6 more
wiley   +1 more source

One-point statistics and intermittency of induced electric field in the solar wind

open access: yes, 2004
The interplanetary induced electric field e=vxb is studied, using solar wind time series. The probability distribution functions (PDFs) of the electric field components are measured from the data and their non-gaussianity is discussed.
Bruno, Roberto   +2 more
core   +1 more source

The Speed of Interplanetary Shocks Through the Magnetosheath: A Toy Model

open access: yesGeophysical Research Letters, Volume 52, Issue 7, 16 April 2025.
Abstract Before interacting with the magnetosphere, an interplanetary shock travels through the magnetosheath where its speed and shape are modified. Previous studies have reported widely different answers to the question of the speed of an interplanetary shock in the magnetosheath. Observational studies generally answer this question “macroscopically”,
C. Moissard   +11 more
wiley   +1 more source

Laboratory Observations of Hall Magnetic Field in Electron‐Only Magnetic Reconnection With a Guide Field

open access: yesGeophysical Research Letters, Volume 52, Issue 7, 16 April 2025.
Abstract Recently, electron‐only reconnection, in which there is no obvious ion bulk flow and ion heating, has been pervasively observed in the Earth's magnetosphere. In this Letter, we realize electron‐only reconnection with a guide field in the Keda Linear Magnetized Plasma (KLMP) device.
Fa Yang   +13 more
wiley   +1 more source

TRANSPORT EQUATION FOR MHD TURBULENCE: APPLICATION TO PARTICLE ACCELERATION AT INTERPLANETARY SHOCKS

open access: yesThe Astrophysical Journal, 2009
The aim of the present paper is to unify the various transport equations for turbulent waves that are used in different areas of space physics. Here, we mostly focus on the magnetohydrodynamic turbulence, in particular the Alfvenic turbulence. The applied methods, however, are general and can be extended to other forms of turbulence, for example the ...
Tamas I. Gombosi   +5 more
openaire   +4 more sources

Origins of the Ambient Solar Wind: Implications for Space Weather

open access: yes, 2017
The Sun's outer atmosphere is heated to temperatures of millions of degrees, and solar plasma flows out into interplanetary space at supersonic speeds. This paper reviews our current understanding of these interrelated problems: coronal heating and the ...
A. Barnes   +364 more
core   +1 more source

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