FILAMENT SUPPORT IN RAPIDLY ROTATING SINGLE STARS - A SIMPLE-MODEL

We present a simple analytical model describing the equilibrium of a s tellar filament in the equatorial plane of a rapidly rotating late-typ e star. We model it as a massive circular current wire under the actio n of gravity, centrifugal and magnetic forces. On applying the conditi on of flux freezing the filament is found to be stable until it reache s large distances from the star or the magnetic field becomes too weak .