High-frequency effects on coronal MHD waves
MHD waves and oscillations in solar coronal waveguides
... of coronal loops was the focus of Chapter ...The high degree of inhomogeneity across the loops is important for effects such as KHI that depend on strong shear at the boundary of coronal ...
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MHD waves generated by high-frequency photospheric vortex motions
... of MHD wave generation and propagation through a three- dimensional open magnetic flux tube in the lower solar at- ...non-linear MHD wave simulations. For a driver we have implemented a high- ...
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The damping of slow MHD waves in solar coronal magnetic fields
... Although MHD waves have been studied extensively in the past, pointing out all the proper- ties of slow magneto-acoustic waves is useful, given the recent amount of observations that have been ...
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High frequency Alfven waves in multi ion coronal plasma : observational implications
... resonant high-frequency (hybrid) branches of the dispersion relation can result in large unresolved wave motions that can lead to broad emission lines of He ++ and O 6+ compared with protons at the same ...
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Contribution of observed multi frequency spectrum of Alfvén waves to coronal heating
... Alfvén waves with shorter wavelengths λ = νV A will lead to more de- veloped ...to waves whose wavelength is comparable to the full ex- tent of the ...period waves are able to oscil- late two times ...
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The Effects of Surface Gravity Waves on High-Frequency Acoustic Propagation in Shallow Water
... The focus of this paper is to present a combined water wave and acoustic wave model to predict acoustic signal temporal fluctuations induced by a sea surface boundary. Comparisons between this simple model output and ...
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Heating effects from driven transverse and Alfvén waves in coronal loops
... To solve the 3-D time-dependent MHD equations, we use the PLUTO code (Mignone et al. 2007). A second- order parabolic spatial scheme is used for integration, the numerical fluxes are computed by a Roe Riemann ...
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3D MHD modeling of twisted coronal loops
... a coronal magnetic fl ux tube that is anchored in the chromosphere and progressively twisted by the rotation of the plasma at the ...the effects in such a complex MHD ...previous MHD modeling ...
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Intermittency in MHD turbulence and coronal nanoflares modelling
... Abstract. High resolution numerical simulations, solar wind data analysis, and measurements at the edges of laboratory plasma devices have allowed for a huge progress in our un- derstanding of MHD ...The ...
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MEASUREMENTS OF SLOPES OF HIGH- FREQUENCY WIND WAVES
... In all measurements, nonlinear effects are important for high- frequency wind waves; nonlinear effects noted are : increase of phase velocity due to finite amplitude of gravit[r] ...
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Slow magnetoacoustic waves in coronal loops
... incorporates effects of non- linearity, dissipation due to finite viscosity and thermal conduc- tion, and gravitational stratification of plasma in the ...the waves, the main factors influencing the wave ...
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Eclipse observations of high frequency oscillations in active region coronal loops
... 4 School of Computer Science, Queen’s University Belfast, Belfast BT7 1NN, UK 5 Observatoire Astronomique de Strasbourg, 11 rue de l’Universit´e, 67000 Strasbourg, France Received 20 August 2002 / Accepted 20 March 2003 ...
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MHD wave interaction with coronal active region plasmas
... sional waves could induce compressible perturbations by the ponderomotive, cen- trifugal and magnetic twist ...the frequency of the inducing torsional ...torsional waves is independent of the ...en ...
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Heating by transverse waves in simulated coronal loops
... verse waves in coronal ...standing waves, for a continuous, monoperiodic, footpoint ...corresponding frequency for our driver, and considering symmetry at the apex, the initially generated ...
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2 Physical Properties of MHD Oscillations and Waves
... of MHD modes are also sensitive to the plasma densities inside and outside of the oscillating structures, and thus provide unique information on basic physical parameters such as the electron density and filling ...
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On Kelvin–Helmholtz and parametric instabilities driven by coronal waves
... to be the point at which the surface Alfv´en wave, unmodified by the shear, would resonate with the driving frequency. Because of the strengths of the magnetic field, most of the modes of interest would have to ...
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A Novel Approach to Resonant Absorption of the Fast MHD Eigenmodes of a Coronal Arcade
... in frequency space at the expense of continuity in ...real frequency of w r V 0 0 - 1 = 5 and for complex ...propagating waves akin to the acoustic jacket modes of helioseismology (see Bogdan & Cally ...
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MHD waves at a spherical interface modelling coronal global EIT waves
... and coronal mass ejections (CMEs) are known to generate global waves, propagating over large distances, sometimes comparable to the solar ...EIT waves are modelled as waves propagating at a ...
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MHD simulations of coronal heating
... Such a set up will create the initial current sheet that will trigger magnetic reconnection. The magnetic energy released from this event will be converted into some kinetic energy, but mainly into heat. For the cases ...
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HIGH FREQUENCY SPECTRUM OF OCEAN WAVES
... It is by no means impossible that some processes previously explained by turbulence-the oceanographer's way of saying that he doesn't understand-are part of the surface w[r] ...
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