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

Published online by Cambridge University Press:  14 August 2015

E. I. Mogilevsky
E. I. Mogilevsky*
Affiliation:
Academy of Sciences of the U.S.S.R., Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation, Dept. of Solar Physics, Moscow, U.S.S.R.

Abstract

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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).

Type
Part V: Theories of Small Scale Magnetic Fields
Information
Symposium - International Astronomical Union , Volume 43: Solar Magnetic Fields , 1971 , pp. 480 - 486
Copyright
Copyright © Reidel 1971 

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