Speaker
Description
In the context of an evolutionary model, the outflow phase of an active galactic nucleus (AGN) occurs at the peak of its activity, once the central supermassive black hole (SMBH) is massive enough to generate sufficient power to counterbalance the potential well of the host galaxy. This outflow feedback phase plays a vital role in galaxy evolution. I will present results from our two recent studies. In the first study, we develop an approach to select powerful AGNs in the feedback phase using optical/IR colours, and optical and X-ray spectral properties from the eROSITA Final Equatorial-Depth Survey (eFEDS). We trace and characterise outflows using SDSS spectroscopy, and explore the link between AGN luminosity and outflow properties. We find that the X-ray selection (eROSITA) is a powerful tool to select AGN in the feedback phase and this X-ray active phase is the best tracer of fast winds. We find a weak correlation between AGN bolometric luminosity and outflow velocity and ~30% of our sample have kinetic coupling efficiencies within 1-10%. In the second study, we perform a spatially resolved analysis of a red, X-ray obscured and X-ray luminous quasar, ID608 at a redshift of z=0.6031. Our analysis reveals that the quasar resides in an interacting system with 3 companion galaxies with outflows that extend up to 9.5 kpc and move at high velocities exceeding 1000 km/s.
