Results 1 to 10 of about 2,729 (231)

Diagnostics of the solar coronal plasmas by magnetohydrodynamic waves: magnetohydrodynamic seismology

open access: yesReviews of Modern Plasma Physics
AbstractMacroscopic wave and oscillatory phenomena ubiquitously detected in the plasma of the corona of the Sun are interpreted in terms of magnetohydrodynamic theory. Fast and slow magnetoacoustic waves are clearly distinguished in observations. Properties of coronal magnetohydrodynamic waves are determined by local parameters of the plasma, including
V M Nakariakov   +2 more
exaly   +3 more sources

Solar Wind Acceleration by Solitary Waves in Coronal Holes

open access: yesAstrophysical Journal, 1997
Coronal holes are well-known sources of the high-speed solar wind; however, the exact acceleration mechanism of the fast wind is still unknown. We solve numerically the time-dependent, nonlinear, resistive 2.5-dimensional MHD equations and find that solitary waves are generated in coronal holes nonlinearly by torsional Alfven waves.
L Ofman, J M Davila
exaly   +2 more sources

Recent advances in solar coronal extreme ultraviolet waves

open access: yesProceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
Solar coronal extreme ultraviolet (EUV) waves are spectacular propagating disturbances in the appearance of EUV emission enhancements in the solar corona, similar to the tsunamis on the Earth. These ‘solar tsunamis’ are closely associated with various solar eruptions, from large-scale coronal mass ejections (CMEs) and solar flares to small-scale solar ...
Ruisheng Zheng
exaly   +2 more sources

Coronal Waves and Oscillations

open access: yesLiving Reviews in Solar Physics, 2005
Wave and oscillatory activity of the solar corona is confidently observed with modern imaging and spectral instruments in the visible light, EUV, X-ray and radio bands, and interpreted in terms of magnetohydrodynamic (MHD) wave theory.
Nakariakov Valery M., Verwichte Erwin
doaj   +2 more sources

Solar Coronal Heating by Kinetic Alfvén Waves

open access: yesThe Astrophysical Journal
The utilization of the Cairns distribution serves as a vital tool for characterizing the nonthermal attributes commonly observed in space plasmas.
Syed Ayaz, Gang Li, Imran A. Khan
doaj   +3 more sources

Why “Solar Tsunamis” Rarely Leave Their Imprints in the Chromosphere

open access: yesThe Astrophysical Journal Letters, 2023
Solar coronal waves frequently appear as bright disturbances that propagate globally from the eruption center in the solar atmosphere, just like the tsunamis in the ocean on Earth.
Ruisheng Zheng   +12 more
doaj   +1 more source

Coronal Transverse Magnetohydrodynamic Waves in a Solar Prominence [PDF]

open access: yesScience, 2007
Solar prominences are cool 10 4 kelvin plasma clouds supported in the surrounding 10 6 kelvin coronal plasma by as-yet-undetermined mechanisms. Observations from Hinode show fine-scale threadlike structures oscillating in the plane of the sky with periods of several minutes.
Okamoto, T. J.   +12 more
openaire   +3 more sources

High-order Harmonics of a Kink Wave and a Narrow Quasiperiodic Fast-propagating Wave Train Excited Simultaneously in a Plasma Resonator

open access: yesThe Astrophysical Journal, 2023
We present the observations of multimode kink waves and a narrow quasiperiodic fast-propagating (QFP) wave train in association with a jet on 2011 December 11.
Zhining Qu   +5 more
doaj   +1 more source

Ion-cyclotron waves in solar coronal hole [PDF]

open access: yesNew Astronomy, 2012
We investigate the effect of the Plume/Interplume Lane (PIPL) structure of the solar Polar Coronal Hole (PCH) on the propagation characteristics of ion-cyclotron waves (ICW). The gradients of physical parameters determined by SOHO and TRACE satellites both parallel and perpendicular to the magnetic field are considered with the aim of determining how ...
Dogan S., Pekünlü E.R.
openaire   +2 more sources

The Heating of Solar Coronal Loops by Alfvén Wave Turbulence [PDF]

open access: yesThe Astrophysical Journal, 2017
Abstract In this paper we further develop a model for the heating of coronal loops by Alfvén wave turbulence (AWT). The Alfvén waves are assumed to be launched from a collection of kilogauss flux tubes in the photosphere at the two ends of the loop.
A. A. van Ballegooijen   +2 more
openaire   +4 more sources

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