(Nature of) Shock Waves (and Particle Acceleration) in the Outskirt of Galaxy Clusters

Galaxy clusters are continuously disturbed by major and minor mergers of clumps and gas infall along filaments of the WHIM. Such activities induce shock waves, which are observed as radio relics and X-ray shocks in cluster outskirts. In this talk, we discuss the properties of shocks that form in sample galaxy clusters from simulations of the large-scale structure of the universe, with a special emphasis on their temporal evolution. We present the radio and X-ray manifestations of simulated shocks, and compare them with observed characteristics of radio relics and X-ray shocks