Small scale substructure, collapse time and dynamical friction

Original · EN

We solve numerically the equations of motion for the collapse of a shell of baryonic matter, made of galaxies and substructure of 10⁶ M ÷10⁹ M, taking into account the dynamical friction and the parameters on which it depends: the peaks' height νc, the number of peaks inside a protocluster Ntot multiplied by the correlation function ξ(r) evaluated at r=0, the filtering radius Rf and the core radius of the cluster of galaxies, r₀. We show how the collapse time of a shell of baryonic matter depends on those parameters.