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Number density profiles of galaxy groups and clusters in the SDSS
(Vanderbilt University. Dept. of Physics and Astronomy, 2008-04-20)
We use projected number density profiles of galaxy groups to investigate the relationship between galaxy group structure and dark matter structure within halos. We primarily study a specific model of how galaxies populate ...
Simulating the universe with GPU-accelerated supercomputers: n-body methods, tests, and examples
(Vanderbilt University. Department of Physics and Astronomy, 2013-04-22)
We demonstrate the acceleration obtained from using GPU/CPU hybrid clusters and supercomputers for N-body simulations of gravity based in part on the author's new code development. Validation tests are shown for ...