The role of cold and hot gas flows in feeding early-type galaxy
  formation
  We study the evolution of the gaseous components in massive simulated
galaxies and show that their early formation is fuelled by cold, low entropy
gas streams. At lower redshifts of z<3 the simulated galaxies are massive
enough to support stable virial shocks resulting in a transition from cold to
hot gas accretion. The gas accretion history of early-type galaxies is directly
linked to the formation of their stellar component in the two phased formation
scenario, in which the central parts of the galaxy assemble rapidly through in
situ star formation and the later assembly is dominated primarily by minor
stellar mergers.
