Abstract
Most models of active galactic nuclei invoke accretion onto a supermassive black hole to explain the enormous X-ray output of these objects. As an alternative to this classical view we propose a supermassive non-collapsed rotator in which the magnetic field is generated and sustained by dynamo action. We show that a coronal emission mechanism, based on magnetic energy dissipation via turbulent loop twisting, can produce X-ray luminosity Lx ∼ 1045 erg s-1 with magnetic field B ∼ 105 G, in a supermassive rotator with mass M = 108 M⊙ and radius R = 1015 cm, characteristic parameters of the AGN's. This model may thus account for the central powerhouse of AGN's.
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