AGN obscuration through dusty infrared dominated flows. II. Multidimensional, radiation-hydrodynamics modeling

Abstract

We explore a detailed model in which the active galactic nucleus (AGN) obscuration results from the extinction of AGN radiation in a global flow driven by the pressure of infrared radiation on dust grains. We assume that external illumination by UV and soft X-rays of the dusty gas located at approximately 1pc away from the supermassive black hole is followed by a conversion of such radiation into IR. Using 2.5D, time-dependent radiation hydrodynamics simulations in a flux-limited diffusion approximation we find that the external illumination can support a geometrically thick obscuration via outflows driven by infrared radiation pressure in AGN with luminosities greater than $0.05L_{\mathrm{edd}}$ and Compton optical depth, ${\tau }_{\mathrm{T}}\gtrsim 1$.

28 pages, 7 figures, version accepted to ApJ

References in corpus (5)

• Resolving the complex structure of the dust torus in the active nucleus of the Circinus galaxy
• Resolving the obscuring torus in NGC 1068 with the power of infrared interferometry: Revealing the inner funnel of dust
• AGN obscuration through dusty infrared dominated flows. I. Radiation-hydrodynamics solution for the wind
• An axisymmetric hydrodynamical model for the torus wind in AGN. II: X-ray excited funnel flow
• Radiation Pressure Supported AGN Tori with Hard X-Ray and Stellar Heating

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