Wednesday 06 Dec 2017[Seminar] The "torus" as a wind: Modelling polar IR emission in AGNs using SPH with radiation transfer

Dr. David Williamson - University of Southampton

Physics, 4th Floor 14:00-15:00

Recent observations (e.g. by Hoenig and Asmus) have shown that the infrared emission of AGNs appears to be extended in the polar direction, and not along the equatorial plane as we might expect from standard "torus" models. This suggests a "torus" model that largely consists of a strong dusty wind, explaining both the polar extension of the infrared emission, and the observed column densities at high latitudes. To test this hypothesis, we are building an SPH-based radiation-hydrodynamics model. In this talk I will summarise the motivating observations, describe our approach for the radiation transfer algorithm, and report on our progress in developing this numerical model in practice.

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