Characterizing multi-phase gas outflows and their powering mechanism in nearby AGN

Active Galactic Nuclei are thought to play a crucial role in
the evolution of massive galaxies. In particular, fast outflows are
frequently observed in AGN covering various gas phases which may remove
a significant fraction of the gas content from the galaxies. I will
review the current state of research in this very active field of
ongoing research together with the advantages and disadvantages of
previous approaches. In particular, I will highlight the importance of
multi-wavelength observations to unravel the true multi-phase nature of
outflows by combining state-of-the-art observational facilities. In this
context I will present the first results from the ongoing Close AGN
Reference Survey (CARS), a multi-wavelength survey of 39 luminous
low-redshift unobscured AGN with extensive observations from VLT/MUSE,
ALMA, VLA, Chandra, SOFIA and many more. In addition, I will present the
multi-phase view of the famous ultra-luminous Quasar 3C273 where we
unlocked a few unknown secrets.