Hydrodynamical simulations of  galaxy clusters including the evolution of dust

GRANATO, GIAN LUIGI; RAGONE FIGUEROA, CINTHIA; GJERGO, EDA; MURANTE, GIUSEPPE

Heraklion

Congreso; The 13th Hellenic Astronomical Conference; 2017

Hellenic Astronomical Society

Hydrodynamical simulations of galaxy clusters including the evolution of dust Dr. Gian Luigi Granato INAF-OATS In order to correctly investigate basic properties of galaxies, such as the star formation rate and the masses of the various baryonic components, it is usually essential to account for dust reprocessing. A combination of simulations and post-processing radiative transfer computations are in principle capable of preducing mock data, for a direct comparison with observation. Until now, however, dust properties have been only included by means of rough post-processing assumptions, leaving room for uncertainties particularly severe at wavelengths shorter than 100 micron. In order to reduce these uncertainties, we implemented in our simulation code GADGET-3 a state of the art treatment of the production and evolution of dust grains. This model traces the creation, evolution, and destruction of dust by mean of various processes. It accounts for the size of dust particles with a two-grain-size approximation. We will present the first result applied to zoom-in simulations of massive galaxy clusters, focusing in particular to the early stages of assembly of the cluster at high redshift, where the SF activity is at its maximum and the proto- cluster regions are rich of cold, dust polluted gas.