Journal ArticleDOI
Wave propagation in a magnetic cylinder
P. M. Edwin,B. Roberts +1 more
TLDR
In this article, the authors investigated the nature of oscillations in a magnetic cylinder embedded in magnetic environment and showed that the standard slender flux tube analysis of a kink mode in a cylinder excludes the possibility of a second mode, which arises under photospheric conditions.Abstract:
The nature of oscillations in a magnetic cylinder embedded in a magnetic environment is investigated. It is shown that the standard slender flux tube analysis of a kink mode in a cylinder excludes the possibility of a second mode, which arises under photospheric conditions. Under coronal conditions, two widely separated classes of oscillation can be freely sustained, one on an acoustic time-scale and the other on an Alfvenic time-scale. The acoustic-type oscillations are always present, but the much shorter period, Alfvenic-type, oscillations arise only in high density (strictly, low Alfven velocity) loops. An application to waves in fibrils is also given, and suggests (following Wentzel, 1979) that they are fast kink waves propagating in a density enhancement.read more
Citations
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Waves in the lower solar atmosphere: the dawn of next-generation solar telescopes
TL;DR: A review of the solar physics community can be found in this paper , where the authors present a two-fold review that is designed to overview both the wave analysis techniques and the recent advancements made over the last decade.
Journal ArticleDOI
Excitation and Damping of Slow Magnetosonic Waves in Flaring Hot Coronal Loops: Effects of Compressive Viscosity
TL;DR: In this article , a 3D magnetohydrodynamic (MHD) visco-resistive model was used to model the excitation and dissipation of slow magnetosonic waves in hot coronal loops with realistic magnetic geometry, enhanced density, and temperature guided by EUV observations.
Journal ArticleDOI
Possible evidence of induced repetitive magnetic reconnection in a superflare from a young solar-type star
TL;DR: In this paper, the authors used singular spectrum analysis (SSA) to detect multiple quasi-periodic pulsations (QPPs) observed during the flaring activity of KIC 8414845, a young, active solar-type star observed by the Kepler mission launched by NASA.
Journal ArticleDOI
The effect of flow on resonant absorption of slow MHD waves in magnetic flux tubes
TL;DR: In this paper, the authors studied the resonance absorption of the kink and sausage modes in the slow continuum under magnetic pore conditions in the presence of flow, and determined the dispersion relation then solved it numerically, and found the frequencies and damping rates of the slow kink/sausage surface modes.
Journal ArticleDOI
Linear MHD Wave Propagation in Time-Dependent Flux Tube
A. Williamson,Robert Erdélyi +1 more
TL;DR: In this article, the amplitude, frequency, and wavenumber of the kink and higher order propagating fast magnetohydrodynamic wave in a leading order approximation to the WKB approach in a zero-β plasma representing the upper solar atmosphere were investigated.
References
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Journal ArticleDOI
Elastic Waves in Layered Media
TL;DR: In this paper, Elastic Waves in Layered Media (ELMW) are used to describe the properties of layered media in a geologiska foreningen i Stockholm Forhandlingar.
Journal ArticleDOI
Wave propagation in a magnetically structured atmosphere
TL;DR: In this paper, the authors investigate the occurrence of magnetoacoustic surface waves at a single magnetic interface and consider in detail the case where one side of the interface is field-free.
Journal ArticleDOI
Wave propagation in a magnetically structured atmosphere: III: The slab in a magnetic environment
P.M. Edwin,B. Roberts +1 more
TL;DR: In this paper, the propagation of waves in a magnetic slab embedded in magnetic environment is investigated and possible modes of propagation are examined from the general dispersion relation, both analytically and numerically, for disturbances which are evanescent in the environment.