  An extensive exploration of the model parameter space of axisymmetric
Early-Type Galaxies (ETGs) hosting a central supermassive Black Hole (SMBH) is
conducted by means of high resolution hydrodynamical simulations performed with
our code MACER. Global properties such as 1) total SMBH accreted mass, 2) final
X-ray luminosity and temperature of the X-ray emitting halos, 3) total amount
of new stars formed from the cooling gas, 4) total ejected mass in form of
supernovae and AGN feedback induced galactic winds, are obtained as a function
of galaxy structure and internal dynamics. In addition to the galactic dark
matter halo, the model galaxies are also embedded in a group/cluster dark
matter halo; finally cosmological accretion is also included, with amount and
time dependence derived from cosmological simulations. Angular momentum
conservation leads to the formation of cold HI disks; these disks further
evolve under the action of star formation induced by disk instabilities, of the
associated mass discharge onto the central SMBH, and of the consequent AGN
feedback. At the end of the simulations, the hot (metal enriched) gas mass is
roughly $10\%$ the mass in the old stars, with twice as much having been
ejected into the intergalactic medium. The cold gas disks are a $\approx$ kpc
in size, and the metal rich new stars are in $0.1$ kpc disks. The masses of
cold gas and new stars are roughly $0.1\%$ the mass of the old stars. Overall,
the final systems appear to reproduce quite successfully the main global
properties of real ETGs.
