Nonlinear stage of instability due to local Joule-overheating in the solar active regions

Physics

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Magnetohydrodynamic Stability, Ohmic Dissipation, Resistance Heating, Solar Activity, Solar Magnetic Field, Energy Conversion, Gravitational Effects, Plasma Heating

Scientific paper

The numerical solution of the system of magnetohydrodynamic equations in the one-dimensional approximation serves as the basis for studying the nonlinear stage of the instability due to local Joule-overheating of zones with large values of magnetic field gradients in the active regions of the sun. We have demonstrated the formation of a system of current layers responsible for efficient transformation of magnetic energy into Joule heat and kinetic energy of the macroscopic motion. The specific features of quasi-stationary skinning of magnetic field with gravitation have been noted.

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