Results 21 to 30 of about 1,619,607 (208)
High-frequency waves in the solar coronal plasma [PDF]
Astronomy & Astrophysics, 2006 We derived numerical solutions of a dispersion equation in order to analyze the effect of finite plasma temperature on the highfrequency wave dispersion characteristics in conditions of hot magnetized plasma in the solar corona. Spectra of the high-frequency eigen modes of these plasma were determined in conditions when the electron gyrofrequency is ...
V. G. Ledenev +2 more
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Fast magnetohydrodynamic waves in a solar coronal arcade [PDF]
Astronomy & Astrophysics, 2017 Aims. To investigate detailed properties of fast MHD modes of a three-dimensional waveguide for a cylindrical magnetic arcade.\ud \ud Methods. To derive governing equations and dispersion relations for different density profiles and to numerically solve them to obtain\ud discrete eigenvalues for fast modes and the corresponding eigenfunctions.\ud \ud ...
Thackray, H., Jain, R.
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Impulsively generated kink wave trains in solar coronal slabs
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT We numerically follow the response of density-enhanced slabs to impulsive, localized, transverse velocity perturbations by working in the framework of ideal magnetohydrodynamics (MHD). Both linear and non-linear regimes are addressed. Kink wave trains are seen to develop along the examined slabs, sharing the characteristics that
Guo, Mingzhe +3 more
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A new method for estimating global coronal wave properties based on their interaction with solar coronal holes [PDF]
Astronomy & Astrophysics, 2020 Among the effects of interactions between global coronal waves (CWs) and coronal holes (CHs) is the formation of reflected and transmitted waves. Observations of such events provide us with measurements of different CW parameters, such as phase speed and intensity amplitudes.
Piantschitsch, I. +2 more
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The propagation and damping of slow magnetoacoustic waves in the solar atmosphere [PDF]
, 2012 The propagation and damping of slow magnetoacoustic waves in the solar atmosphere is investigated, with particular emphasis placed on waves with periodicities of five minutes. The basic model of a uniform temperature loop is extended by the addition of
Owen, Nicholas Robert
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3D reconstruction of coronal loops by the principal component analysis [PDF]
, 2013 Knowing the three dimensional structure of plasma filaments in the uppermost part of the solar atmosphere, known as coronal loops, and especially their length, is an important parameter in the wave-based diagnostics of this part of the Sun.
Nisticò, Giuseppe +6 more
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Solar flares and coronal shock waves [PDF]
Journal of Geophysical Research: Space Physics, 2001 The ignition of coronal shock waves by solar flares is investigated confronting the results of a simple MHD model with the observations. Characteristics of type II bursts recorded in the metric and decametric wavelength range are compared with the properties of the microwave and soft X‐ray bursts of the associated flares.
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Density Enhancement Streams in The Solar Wind
The Astrophysical Journal Letters, 2023 This Letter describes a new phenomenon on the Parker Solar Probe of recurring plasma density enhancements that have Δ n/n ∼ 10% and that occur at a repetition rate of ∼5 Hz.
F. S. Mozer +7 more
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Impulsive Solar Energetic Particle Events: Extreme-Ultraviolet Waves and Jets
Frontiers in Astronomy and Space Sciences, 2022 Impulsive solar energetic particle (ISEP) events show peculiar elemental composition, with enhanced 3He and heavy-ion abundances, markedly different from our Solar System composition.
Radoslav Bučík
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MHD Waves and Oscillations in Solar Coronal Waveguides [PDF]
, 2018 Perturbations of coronal structures by impulsive events such as solar flares generate waves which are interpreted with MHD theory. These waves allow plasma processes to be studied, and seismology of the local plasma parameters to be performed.
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