Coffee talks
Friday 29/05/2026 @ 11:30, Sala riunioni quarto piano e on-line (meet.google.com/sue-bwvk-axf)
Elisa Amenta (University of Bologna, INAF-IRA), "Outflows in Radio-Quiet AGN: Radio Emission as a Feedback Tracer"
Outflows in Active-Galactic Nuclei (AGN), either in the form of winds or jets, are now routinely detected at all ionisation states, velocities and distances from the inner SMBH. These range from the sub-relativistic (0.1 ? 0.25c), highly ionised, ultra-fast outflows (UFOs), arising at few gravitational radii, down to the slower (? 500 ? 2000 km/s) outflows detected on kpc-scales, in the atomic and molecular gas phases. Because of their potential ubiquitousness, winds and jets are frequently proposed as a preferential channel for AGN-feedback, successfully regulating both accretion and ejection onto the central black hole, quenching star formation and potentially explaining the scaling relations between black hole mass and host galaxy properties. In this context, radio-quiet AGN, much more common than their jet-dominated radio-loud counterpart, provide a unique window into feedback processes. Indeed, because the radio emission in faint radio sources is not buried in that of a relativistic jet, it is possible to try to disentangle between various processes, including star-formation activity, coronal activity, accretion disk winds and small-scale jets. In particular investigating the impact of low-power radio jets and winds on the host galaxy and their relation with outflows in different gas phases is fundamental for our understanding of AGN feedback and galaxy evolution. In this talk I will present key results from the X-ray-selected radio-quiet AGN of SUBWAYS (z ~0.1–0.5, ), where UFOs have been detected as Fe K-shell X- ray absorption-line features. Radio follow-up observations show that the majority of the AGN in the sample exhibit extended radio emission and steep radio spectra, consistent with hosting radio outflows. This may hint at an interesting, and still poorly-understood, connection between nuclear and large scale outflows.