Visualization of results from a cosmological hydrodynamical simulation run with the CRK-HACC code. The figure shows the present-day gas distribution, with the density (brightness) and temperature (color) integrated along a slab of one-tenth the thickness of one side of the simulation cube. The inset highlights the details and the environment of a cluster of galaxies; clusters are the most massive bound objects in the universe, dominated by dark matter and containing very hot gas and hundreds to thousands of galaxies. The simulation was run on the Summit system at Oak Ridge National Laboratory and the ray tracing for the visualization was performed on the Polaris system at Argonne National Laboratory. Credit: Michael Buehlmann and the HACC team, Argonne National Laboratory.
