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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Journal ArticleDOI
Transverse Oscillations of Longitudinally Stratified Coronal Loops System
Narges Fathalian,Hossein Safari +1 more
TL;DR: In this paper, the effects of longitudinal density stratification along the loop axis, on the collective kinklike modes of system of coronal loops were investigated, and the fundamental and first overtone frequencies and longitudinal wave numbers were computed.
Journal ArticleDOI
Quasi-periodic pulsations and diagnostics of flaring plasma
A. V. Stepanov,V. V. Zaitsev +1 more
TL;DR: In this article, two approaches in the interpretation of quasi-periodic pulsations in solar and stellar flares are presented: flaring loops as resonators for magneto-hydrodynamic (MHD) oscillations.
Journal ArticleDOI
Do Coronal Loops Oscillate in Isolation
Bradley W. Hindman,Rekha Jain +1 more
TL;DR: In this article, a simple model of a loop embedded within an arc is presented, and the eigenmodes of the arc and its eigenvectors become coupled, and it is shown that most loops are too close to other magnetic structures to oscillate in isolation.
Journal ArticleDOI
Modeling the interaction of solitary waves in magnetic tubes
TL;DR: In this paper, the Cauchy problems of the propagation of a single wave and the interaction of two solitary waves of different amplitude are solved numerically for the case of slow symmetric surface waves in a magnetic tube.
Journal ArticleDOI
Magnetically coupled atmosphere, fast sausage MHD waves, and forced magnetic field reconnection during the SOL2014-09-10T17:45 flare
Hana Mészárosová,Peter Gömöry +1 more
TL;DR: In this paper, the physical properties and behaviour of the solar atmosphere during the GOES X1.6 solar flare on 2014 September 10 were studied with the help of the Vertical-Current Approximation Nonlinear Force-Free Field code.
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.