An axisymmetric, nonstationary electrodynamic model of the central engine in an active galactic nucleus

An axisymmetric, stationary model of the central engine in an active galactic nucleus has been investigated as the background of the Blandford-Znajek process, which consists of the supermassive black hole surrounded by a magnetized accretion disk. This model was reformulated and extended by Macdonald and Thorne, and their work forms the basis for our model. Our model, however, includes the secular effects of the mass accretion, and has …