Magnetic oscillations and waves in unsaturated ferromagnet

2020 ◽  
pp. 215-230
Author(s):  
A.G. Gurevich ◽  
G.A. Melkov
Keyword(s):  
Oscillations And Waves ◽  
Magnetic Oscillations

scholarly journals Statistical Model of Small Scale Discrete Structure of Magnetoplasma in Active Regions of the Sun

1971 ◽  
Vol 43 ◽  
pp. 480-486
Author(s):  
E. I. Mogilevsky
Keyword(s):  
Active Region ◽  
Statistical Model ◽  
Effective Conductivity ◽  
Low Frequency ◽  
Active Regions ◽  
Solar Radio Emission ◽  
Small Scale ◽  
Oscillations And Waves ◽  
Short Time ◽  
Magnetic Oscillations

A possible statistical model of the solar magnetoplasma in solar active regions consisting of a totality of small-scale current vortex plasma elements (‘subgranules’) is discussed. Some results are given which naturally follow from such a model: the small value of effective conductivity in the macro-structures of the plasma (hence, the possibility of a greater mobility and changeability of field and plasma for a short time), the formation of filamentary-structural elements, the oscillating regime of the magnetoplasma in an active region. A principal scheme is given of the experiment on a solar magnetograph with very high resolution, which is able to reveal discrete fields of the subgranules. The dispersion equation is derived for macro-magnetic oscillations of the statistical ensemble of magnetized subgranules. The possibility is noted to reveal macro-magnetic oscillations and waves during observations of low-frequency modulation in the solar radio-emission. It is shown that at solar radioburst propagation in the corona, (according to the model under consideration, some regularly located plasma inhomogeneities should be present in the active region) Bragg's diffraction takes place. Typical properties of complex radiobursts may be received (extreme narrowness of the band, short lifetime, directivity).

On Extensional Oscillations and Waves in Elastic Rods

1998 ◽  
Vol 3 (3) ◽  
pp. 277-295 ◽  
Author(s):  
Shankar Krishnaswamy ◽  
R. C. Batra
Keyword(s):  
Elastic Rods ◽  
Oscillations And Waves

scholarly journals Observational aspects of prominence oscillations

2007 ◽  
Vol 3 (S247) ◽  
pp. 152-157 ◽  
Author(s):  
Oddbjørn Engvold
Keyword(s):  
Magnetic Structure ◽  
Numerical Models ◽  
Small Scale ◽  
Solar Prominences ◽  
Scale Structures ◽  
Oscillations And Waves ◽  
Available Information ◽  
Small Scale Structures

AbstractSeismology has become a powerful tool in studies of the magnetic structure of solar prominences and filaments. Reversely, analytical and numerical models are guided by available information about the spatial and thermodynamical structure of these enigmatic structures. The present invited paper reviews recent observational results on oscillations and waves as well as details about small-scale structures and dynamics of prominences and filaments.

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