出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present a physical model for the coevolution of massive spheroidal galaxies and active nuclei
at their centers. Supernova heating is increasingly effective in slowing down the star formation
and in driving gas outflows in smaller and smaller dark matter halos. Thus the more massive
protogalaxies virializing at early times are the sites of faster star formation. In the central galactic
regions the correspondingly higher radiation drag due to starlight acts on the cold gas, further decreasing
its angular momentum and causing an inflow towards the central BH, increasing its mass
and powering the nuclear activity. In turn, the feedbacks from SN explosions and in particular
from the active nucleus regulate the star formation rate and the gas inflow, and eventually unbind
the residual gas, thus halting both the star formation and the BH growth, in a time shorter for
larger halos. The model accounts for a broad variety of dynamical, photometric and metallicity
properties of early-type galaxies, for the local supermassive black-hole mass function and for the
relation between the MBH and s, as well as an even tighter correspondence between MBH and the
mass in stars.
