Bibcode
Garcia-Bernete, I.; Ramos Almeida, C.; Acosta-Pulido, J. A.; et al.
Referencia bibliográfica
Active Galactic Nuclei: what's in a name? Proceedings of a conference held 27 June - 1 July, 2016 in Garching, id.16
Fecha de publicación:
8
2016
Número de citas
0
Número de citas referidas
0
Descripción
We present subarcsecond resolution mid-infrared (MIR) images obtained
with 8-10 m-class ground-based telescopes of a complete volume-limited
(DL<40 pc) sample of 24 Seyfert galaxies selected from the Swift/BAT
nine month Catalog. We use those MIR images to study the nuclear and
circumnuclear emission of the galaxies. Using different methods to
classify the MIR morphologies on scales of ~200 pc, we found that the
majority of the galaxies (75-79%) are extended or possibly extended and
21-25 % are point-like. In general, we find that galaxies with larger
inclinations show more extended morphologies than face-on galaxies, and
we do not find significant differences between the morphologies of Sy1
and Sy2. This extended emission is weak and compact and it represents
~30% of the total MIR emission of the galaxies in the sample. We obtain
nuclear and circumnuclear MIR fluxes to investigate their correlation
with different AGN and star formation indicators. We find that the
nuclear MIR emission (inner ~70 pc) is strongly correlated with the
X-ray emission (the harder the X-rays the better the correlation) and
with the [O IV]λ25.89 micron emission line. We find the same
results, although with more scatter, for the circumnuclear MIR emission.
This indicates that AGN photoionization is the dominant source of
excitation of the nuclear and circumnuclear MIR emission.