The oblique magnetic rotator is a satisfactory model describing the general properties of the magnetic Ap stars. The inferred rotation periods are almost always considerably longer than those of the normal A stars. The loss of angular momentum is plausibly the result of magnetic coupling with external gas during some epoch in the star’s life. The same Maxwell stresses that brake the stellar rot...

The thermodynamics of an electrically charged, multicomponent continuous medium with intrinsic rotation is analysed in the presence of electromagnetic fields with a weak linear magnetoelectric coupling in the non-relativistic limit. Taking into account the chemical composition of the current densities and stress tensors yields scalar dissipation terms accounting for chemical reactivities and ve...