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A new approach to simulating collisionless dark matter fluids
Oliver Hahn, Tom Abel, Ralf Kaehler
Recently, we have shown how current cosmological N-body codes already follow the fine grained phase-space information of the dark matter fluid. Using a tetrahedral tesselation of t…
Rhapsody. II. Subhalo Properties and the Impact of Tidal Stripping From a Statistical Sample of Cluster-Size Halos
Hao-Yi Wu, Oliver Hahn, Risa H. Wechsler +2
We discuss the properties of subhalos in cluster-size halos, using a high-resolution statistical sample: the Rhapsody simulations introduced in Wu et al. (2012). We demonstrate tha…
Halo-to-Halo Similarity and Scatter in the Velocity Distribution of Dark Matter
Yao-Yuan Mao, Louis E. Strigari, Risa H. Wechsler +2
We examine the Velocity Distribution Function (VDF) in dark matter halos from Milky Way to cluster mass scales. We identify an empirical model for the VDF with a wider peak and a s…
Rhapsody. I. Structural Properties and Formation History From a Statistical Sample of Re-simulated Cluster-size Halos
Hao-Yi Wu, Oliver Hahn, Risa H. Wechsler +2
We present the first results from the Rhapsody cluster re-simulation project: a sample of 96 "zoom-in" simulations of dark matter halos of 10^14.8 +- 0.05 Msun/h, selected from a 1…
A Novel Approach to Visualizing Dark Matter Simulations
Ralf Kaehler, Oliver Hahn, Tom Abel
In the last decades cosmological N-body dark matter simulations have enabled ab initio studies of the formation of structure in the Universe. Gravity amplified small density fluctu…