AGN feeding and feedback in Fornax A: kinematical analysis of the
  multi-phase ISM
  We present a multi-wavelength study of the gaseous medium surrounding the
nearby active galactic nucleus (AGN) Fornax A. Using MeerKAT, ALMA and MUSE
observations we reveal a complex distribution of the atomic (HI), molecular
(CO), and ionised gas in its centre and along the radio jets. By studying the
multi-scale kinematics of the multi-phase gas, we reveal the presence of
concurrent AGN feeding and feedback phenomena. Several clouds and an extended 3
kpc filament -- perpendicular to the radio jets and the inner disk ($r\lesssim
4.5$ kpc) -- show highly-turbulent kinematics, which likely induces nonlinear
condensation and subsequent Chaotic Cold Accretion (CCA) onto the AGN. In the
wake of the radio jets and in an external ($r\gtrsim 4.5$ kpc) ring, we
identify an entrained massive ($\sim$ $10^7$ M$_\odot$) multi-phase outflow
($v_{\rm OUT}\sim 2000$ km s$^{-1}$). The rapid flickering of the nuclear
activity of Fornax A ($\sim$ 3 Myr) and the gas experiencing turbulent
condensation raining onto the AGN provide quantitative evidence that a
recurrent, tight feeding and feedback cycle may be self-regulating the activity
of Fornax A, in agreement with CCA simulations. To date, this is one of the
most in-depth probes of such a mechanism, paving the way to apply these precise
diagnostics to a larger sample of nearby AGN hosts and their multi-phase ISM.
