Kavli Affiliate: Claudio Ricci
| First 5 Authors: Omaira González-Martín, Daniel J. Díaz-González, Mariela Martínez-Paredes, Almudena Alonso-Herrero, Enrique López-Rodríguez
| Summary:
We investigate the capabilities of the mid-infrared instrument (MIRI) of
James Webb Space Telescope (JWST) to advance our knowledge of AGN dust using
the spectral fitting technique on an AGN collection of 21 nearby (z<0.05) AGN
(7 type-1 and 14 type-2) observations obtained with the medium resolution
spectroscopy (MRS) mode. This collection includes publicly available AGN and
data from the collaboration of Galactic Activity, Torus, and Outflow Survey
(GATOS). We developed a tool named MRSPSFisol that decomposes MRS cubes into
point-like and extended contributions. We found statistically good fits for 12
targets with current AGN dust models. The model that provides good fits
(chi2/dof<2) for {these 12 targets} assumes a combination of clumpy and smooth
distribution of dust in a flare-disk geometry where the dust grain size is a
free parameter. Still, two and one AGN statistically prefer the disk+wind and
the classical clumpy torus model, respectively. However, the currently
available models fail to reproduce 40% of the targets, likely due to the
extreme silicate features not well reproduced by the models and signatures of
water-ice and aliphatic hydrocarbon absorption features in most targets. New
models exploring, for instance, new chemistry, are needed to explain the
complexity of AGN dust continuum emission observed by JWST.
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