Poster abstract details

Mid-infrared nuclear emission in QSOs
M. Martínez-Paredes, I. Aretxaga, A. Alonso-Herrero and Piratas team


In recent years there has been significant effort to resolve nuclear starburst and model the dusty clumpy torus of Seyfert galaxies. The possibility to resolve the nuclear mid-IR emission and model the dusty torus in QSOs has been limited due to insufficient high spatial resolution. We present a study in which we are looking for extended nuclear emission in a sample of 20 nearby QSOs (z<0.1). We are using high spatial resolution (~0.3”) images at 8.7 μm and N-band spectroscopy from CanariCam on the 10.4m Gran Telescopio de Canarias (GTC). By analyze the photometry, we are finding that nuclear emission (~ 600-800 pc) of QSOs is predominantly dominated by the AGN. We use our measurements of unresolved component and mid-IR nuclear spectrum plus all the high spatial resolution data from the literature in the near- and mid-IR to fit the spectral energy distributions of clumpy models (through Bayesclumpy tool) and derive the physical properties of the dusty torus. Our recent results are pointing to that parameters in the torus of QSO are consistent with those derive in Seyfert 1s galaxies.