Testing the blast-wave AGN feedback scenario in MCG-03-58-007
Date Issued
2019
Author(s)
Sirressi, M.
•
CICONE, CLAUDIA
•
SEVERGNINI, Paola
•
BRAITO, Valentina
•
Dotti, M.
•
DELLA CECA, Roberto
•
Reeves, J. N.
•
Matzeu, G. A.
•
Vignali, C.
•
Ballo, L.
Abstract
We report the first Atacama large millimeter/submillimeter array observations of MCG-03-58-007, a local (z = 0.03236 ± 0.00002, this work) AGN (L_{AGN }∼ 10^{45} erg s^{-1}), hosting a powerful X-ray ultrafast (v = 0.1c) outflow (UFO). The CO(1-0) line emission is observed across ∼18 kpc scales with a resolution of ∼ 1 kpc. About 78 per cent of the CO(1-0) luminosity traces a galaxy-size rotating disc. However, after subtracting the emission due to such rotating disc, we detect with a S/N = 20 a residual emission in the central ∼4 kpc. Such residuals may trace a low velocity (vLOS = 170 km s-1) outflow. We compare the momentum rate (\dot{P}) and kinetic power (\dot{E}) of such putative molecular outflow with that of the X-ray UFO and find \dot{P}_{ mol}/\dot{P}_{ UFO}∼ 0.4 and \dot{E}_{ mol}/\dot{E}_{ UFO}∼ 4× 10^{-3}. This result is at odds with the energy-conserving scenario suggested by the large momentum boosts measured in some other molecular outflows. An alternative interpretation of the residual CO emission would be a compact rotating structure, distinct from the main disc, which would be a factor of ∼10-100 more extended and massive than typical circumnuclear discs revealed in Seyferts. In conclusion, in both scenarios, our results rule out the hypothesis of a momentum-boosted molecular outflow in this AGN, despite the presence of a powerful X-ray UFO.
Volume
489
Issue
2
Start page
1927
Issn Identifier
0035-8711
Ads BibCode
2019MNRAS.489.1927S
Rights
open.access