Why cosmic voids matter: nonlinear structure & linear dynamics

We use the Magneticum suite of state-of-the-art hydrodynamical simulations to identify cosmic voids based on watershed technique and investigate their most fundamental properties across different resolutions in mass scale. This encompasses distributions void sizes, shapes, content, as well radial density velocity profiles traced by distribution cold dark matter particles halos. also study impact various tracer properties, such sparsity mass, influence merging these summary statistics. Our results reveal that all analyzed are physically related each other describe universal characteristics largely independent type resolution. Most notably, we find motion tracers around centers is perfectly consistent with linear dynamics, both for individual, stacked voids. Despite large range scales accessible our simulations, unable occurrence nonlinear dynamics even inside only a few Mpc size. suggests be among pristine probes cosmology down commonly referred highly field large-scale structure.