Bibcode
Fernández Ontiveros, Juan Antonio; Prieto, Almudena; Acosta-Pulido, Jose Antonio; Orienti, Monica
Bibliographical reference
37th COSPAR Scientific Assembly. Held 13-20 July 2008, in Montréal, Canada., p.871
Advertised on:
0
2008
Citations
0
Refereed citations
0
Description
Starbursts and AGNs are frequently coupled in the central kiloparsecs of
seyfert galaxies, where molecular gas plays a critical role in fueling
nuclear starburst activity and feeding the central black hole. Unveiling
the dusty nuclear regions with high-resolution techniques in the
nearinfrared permit us to distinguish between the AGN and the Super
Stellar Clusters (SSCs) emission, characterizing both sources
separately. A small sample of nearby galaxies have been observed with
VLT@NaCo adaptive optics in the near-infrared. These observations were
completed with similar high spatial resolution data in the
mid-infrared(VLT@VISIR), optical (HST) and radio wavelengths (VLA,ATCA).
AGN and central cluster Spectral Energy Distributions (SEDs) were built
and compared with observational and/or modelled templates for AGNs and
star forming regions in the literature. Hot dust emission (˜ 1400
K) has been detected in NGC 253 nuclear clusters, an absent feature in
low spatial resolution templates. We also found a new alignment for this
galaxy between NIR and radio data due to the high spatial resolution in
both spectral regions, finding NIR counterparts for 8 known radio
sources. The H2 (2.12 µm) line emission for NGC 7582 proved to be
perpendicular to the ionization cone axis of this galaxy, in agreement
with the existence of a molecular reservoir in the inner 100 parsecs,
close to the AGN.