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Torus Models for Obscuration in Type 2 AGN
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Growing Black Holes: Accretion in a Cosmological Context
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We discuss a clumpy model of obscuring dusty tori around AGN. Cloud-cloud collisions lead to an effective viscosity and a geometrically thick accretion disk, which has the required properties of a torus. Accretion in the combined gravitational potential of central black hole and stellar cluster generates free energy, which is dissipated in collisions, and maintains the thickness of the torus. A quantitative treatment for the torus in the prototypical Seyfert 2 nucleus of NGC 1068 together with
doi:10.1007/11403913_46
fatcat:a5d7cw3thnhflc2tmdfhwry524