Kavli Affiliate: Claudio Ricci
| First 5 Authors: Federico Esposito, Almudena Alonso-Herrero, Santiago García-Burillo, Viviana Casasola, Françoise Combes
| Summary:
We present new optical GTC/MEGARA seeing-limited (0.9") integral-field
observations of NGC 5506, together with ALMA observations of the CO(3-2)
transition at a 0.2" (25 pc) resolution. NGC 5506 is a luminous (bolometric
luminosity of $sim 10^{44}$ erg/s) nearby (26 Mpc) Seyfert galaxy, part of the
Galaxy Activity, Torus, and Outflow Survey (GATOS). We modelled the CO(3-2)
kinematics with 3D-Barolo, revealing a rotating and outflowing cold gas ring
within the central 1.2 kpc. We derived an integrated cold molecular gas mass
outflow rate for the ring of 8 M$_{odot}$/yr. We fitted the optical emission
lines with a maximum of two Gaussian components to separate rotation from
non-circular motions. We detected high [OIII]$lambda$5007 projected velocities
(up to 1000 km/s) at the active galactic nucleus (AGN) position, decreasing
with radius to an average 330 km/s around 350 pc. We also modelled the [OIII]
gas kinematics with a non-parametric method, estimating the ionisation
parameter and electron density in every spaxel, from which we derived an
ionised mass outflow rate of 0.076 M$_{odot}$/yr within the central 1.2 kpc.
Regions of high CO(3-2) velocity dispersion, extending to projected distances
of 350 pc from the AGN, appear to be the result from the interaction of the AGN
wind with molecular gas in the galaxy’s disc. Additionally, we find the ionised
outflow to spatially correlate with radio and soft X-ray emission in the
central kiloparsec. We conclude that the effects of AGN feedback in NGC 5506
manifest as a large-scale ionised wind interacting with the molecular disc,
resulting in outflows extending to radial distances of 610 pc
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