Nonsolid rotation of structures in isothermal magnetized atmospheres

Possible equilibrium rotating magnetized plasma configurations in which ang ular asymmetry due to a nonuniform distribution of the molecular weight is absent are studied. The viscosity of the medium is assumed to be negligible . The variables in exact nonlinear equations are separated by representing the vector fields as series in orthogonal vector spherical harmonics. These series are normally divergent. However, the truncation of the series is al so possible. Equilibrium models corresponding to the truncated series are g eneralizations of a simple rigidly rotating model. They are studied below. It is shown that nonaxisymmetric equilibrium structures with the magnetic f ield of a tilted dipole are possible. In the case of an isothermal atmosphe re, conditions for the superrotation of the medium and meridional circulati on of the matter may arise. The feasibility of such conditions in the Earth 's upper atmosphere is discussed. (C) 2001 MAIK "Nauka/Interperiodica".