Table 1: Cosmological and gas physics parameters used in the simulations. Densities relative to critical density are labelled $\Omega $. $\Omega _{\rm tot}$ is the density of universe, all components included, $\Omega _{\rm b}$ is the baryon density, $\Omega _{\Lambda }$ the vacuum energy density, $\Omega _{\rm DM}$ the dark matter density. h is the reduced Hubble constant, $n_{\rm s}$ the spectral index of primordial density power spectrum, $\sigma _8$ the rms density fluctuations in spheres of $8~\rm MPc$ diameter, $f_{\rm Mass}$ the mass function used in cluster abundance computations, $T_{\star }$ the cluster mass-temperature normalisation factor, and $f_{\rm g}$ the cluster gas mass fraction. The double vertical line destinguishes the primordial cosmological parameters, from the ingredients of the structure formation semi-analytic model.
$\Omega _{\rm tot}$ $\Omega _{\rm b}$ $\Omega _{\Lambda }$ $\Omega _{\rm DM}$ h $n_{\rm s}$ $\sigma _8$ $f_{\rm mass}$ $T_{\star }$ $f_{\rm g}$

0.05 0.7 0.25 0.7 1 0.9 S. & T. 1.9 $0.9 ~ \Omega_{\rm b} / \Omega_{\rm m}$

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