From the Circumnuclear Disk in the Galactic Center to thick, obscuring tori of AGNs

The accretion rates needed to fuel the central black hole in a galaxy can be achieved via viscous torques thick disks and rings, which resolved by millimetre interferometry within inner ~20pc of active NGC1068 at comparable scales sensitivity single dish observations Circumnuclear Disk (CND) Galactic Center. To interpret these regions determine physical properties their gas distribution, we present modelling effort that includes (i) simple dynamical simulations involving partially inelastic collisions between disk clouds, (ii) an analytical model turbulent clumpy calibrated observations, (iii) local cosmic ray heating cooling H2O, H2, CO emission, (iv) determination molecular abundances. We also consider photodissociation (PDR) where is directly illuminated engine. compare resulting datacubes CO, HCN, HCO+, CS brightness temperatures available observations. In both cases kinematics explained one or two clouds colliding with pre-existing ring, prograde sense for CND retrograde NGC1068. And, only dense line fluxes reproduced factor about two. avoid self-absorption intercloud medium, largest scales, height, has decreased 50-200. Our models indicate mechanical energy input dominant mechanism disks. N1068, while bulk AGN X-ray radiation absorbed layer Compton-thick inside dust sublimation radius, optical/UV may enhance emission from ~50% edge ring.