Abstract:
A new self-organized critical (SOC) model of solar flares is proposed. Due to diversity and complex interconnection of processes in the Sun photosphere one need to find the ‘main’ process driving other processes. The reconnection of the magnetic field in the Sun atmosphere was usually treated as the main process in the SOC-models. But we guess that it is the annihilation of opposite charged magnetic elements on the Sun surface. These elements are intersections of the magnetic tubes with the Sun surface. The energy released in the annihilation causes the mechanical motion of the plasma, which in turn ignites annihilations in the adjacent regions giving a chain reaction of annihilations. Computer simulations of a cellular automaton for this process show that the system organizes itself into critical state with power law distributions of energies, areas, duration's and flounce peaks of flares. However the exponents of distribution are somewhat lower than the values observed in nature. We believe that the increased values are given by the inertia effects. Annihilations cause macroscopic outward flows extruding activity to periphery of the flare and thus extending size of the flare if it was big enough to initiate such flows. The stronger is inertia the steeper are probability distributions.
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