Dependence on redshift of the dark matter halo virial mass (a), the virial temperature (b), the gas mass (c), the stellar mass (d), the SFR (e), and the gas metallicity (f) for four halos with different mass assembly histories and nearly the same final halo mass (within 10%). The red dashed line in panel b shows T_eq (Δ_vir∕3), the virial temperature below which smooth accretion of baryons is shut off.