MHD-MODEL OF QUASI-PERIODIC SOLAR CORONAL PULSATIONS
https://doi.org/10.37493/2307-910X.2020.4.13
Abstract
We study quasi-periodic pulsations observed in the solar corona by the microwave and hard X-ray emission. One of its interpretation is oscillations of flare coronal magnetic flux tubes. Its properties are studied well in the approximation of the linear magne-tohydrodynamics. Now we study the fast magnetoacoustic waves in the weakly-nonlinear approximation. Previously this study has been carried out in plane geometry, here we investigate weakly nonlinear waves in cylindrical geometry. A mathematical model of a non-linear evolution of the wave envelope is considered, it is based on the nonlinear Schrddinger equation. This model is used to study the modula-tional instability of fast magnetoacoustic waves and the generation of quasi-periodic oscillations of flare coronal loops.
About the Authors
B. B. Mikhalyaev
Kalmyk State University
Россия
Россия
G. A. Mankaeva
Kalmyk State University
Россия
Россия
L. N. Dzhimbeeva
Kalmyk State University
Россия
Россия
O. V. Hongorova
Ivanovo Fire-Rescue Academy
Россия
Россия
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Review
For citations:
Mikhalyaev B.B., Mankaeva G.A., Dzhimbeeva L.N., Hongorova O.V. MHD-MODEL OF QUASI-PERIODIC SOLAR CORONAL PULSATIONS. Modern Science and Innovations. 2020;(4):90-94. (In Russ.) https://doi.org/10.37493/2307-910X.2020.4.13
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