Solar Physics

1_Solar_processes

Physical processes in the solar interior, its atmosphere and crown, are characterized by the presence of structural formations as sunspots, prominences, arcade of loops, solar spicules, magnetic power tubes emitted from the chromosphere into the corona, coronary mass emissions, differential rotation of Sun, meridional circulation and big-scale flows.

In the department was established mathematical model of coronal mass ejection (CME) based on magnetic vortex ring. This model allowed to explain such phenomena as CME extension and the fact that it has its own speed, which can exceed the speed of the solar wind. This model is enveloped now, taking into account the heterogeneity of plasma inside and outside the ring.

In the department was builded the mathematical model of spicules, which show that a high altitude, raised by spicules, can be explain by resonance effects. The hypothesis of global poloidal current generation on the Sun is proved as a result of lost stability of its differential rotation.

Solar magnetic tubes. The problem of generatiion of MHD perturbations in the solar magnetic tubes was investigated. The terms of propagation of these large-scale wave modes which determine the dynamics of the solar magnetic tubes was established. The detailed analysis of incompressible modes for solar plasma tubes with uniform twisted plasma flow and magnetic field is done. It is shown that in these conditions implemented new, not analized previously, MHD quick modes. These modes exists only with presence of vertical and azimuthal currents of plasma. Together with colleagues from the University of. Sheffield (UK) was made a verification of the developed models of wave propagation in the solar magnetic tubes according SOT Telescope aboard Hinode Japanese spacecraft.

Global currents on the sun. A mathematical model of torsion oscillations and spatial and temporal variations of poloidal current on the sun is builded. There was investigated the influence of confined zone of instability of differential rotation of the Sun on the formation of global currents. It is shown that global currents are formed not only where the original differential rotation loses its stability but also in adjacent volumes of these places where latitudinal current is stable for Rayleigh criterion. Formulated a necessary condition of global currents outside instability.

Turbulent processes on the sun. Here is offered a short-term prediction alternative mechanism of solar flares based on an analysis of short bursts of solar radiation. Formation of this radiation associated with the development of small-scale saturated turbulence in the solar chromosphere active regions.