Testing the blast-wave AGN feedback scenario in MCG-03-58-007

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 (LAGN ∼ 1045 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 theCO(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 (P ) and kinetic power (E) of such putative molecular outflow with that of the X-ray UFO and find P mol/P UFO ∼ 0.4 and Emol/ EUFO ∼ 4 × 10-3. This result is at odds with the energyconserving 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.