ON PARTICULAR SOLUTIONS OF MHD EQUATIONS FOR A SINGLE-FLUID COLLISIONLESS PLASMA OF ANISOTROPIC SOLAR WIND

Abstract

In this work the MHD theory of the solar wind is considered, taking into account the anisotropy of the heat flux and the thermal pressure of the plasma.The resulting equations have singularities. The dependence of the solar wind speed on the radial distance is complex and depends on the thermal velocities of plasma particles.In this study, special solutions for different comparable cases of the components of the solar wind speed and the thermal velocity of the plasma are considered. As a result, the expressions depending on the speed of the solar wind for different distances from the sun and the radial distance for the Mach number were obtained. Found formulas are particular solutions. The obtained expressions play an important role in determining of the speed of the solar wind on the whole heliosphere. The radial dependences of the solar wind velocity and thermal velocities are investigated for several special cases.