2006, Vol.13, pp.183-191

We develop the analytical model of accretion disk magnetosphere dynamics around supermassive nonrotating black holes in the centers of active galactic nuclei. Based on general relativistic equations of magnetohydrodynamics we find nonstationary solutions for time-dependent dynamo action in the accretion disks, spatial and temporary distribution of magnetic field. We show that there are two distinct stages of dynamo process: transient regime and steady-state one, the induction of magnetic field at some moment of time becomes time-independent, and magnetic field is located near the innermost stable circular orbit. Applications of such systems with nonrotating black holes in real active galactic nuclei are discussed.
Key words: galaxies: active, accretion, MHD, magnetic fields

Full text:  Acrobat PDF  (188KB)