Density Profiles of Dark Matter Halos

Details Density Profiles of Dark Matter Halos Density Profiles of Dark Matter Halos

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21540801r&link_type=abstract

American Astronomical Society, AAS Meeting #215, #408.01; Bulletin of the American Astronomical Society, Vol. 42, p.232

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We examine the density profiles of dark matter halos by analyzing data from the LasDamas (Large Suite of Dark Matter Simulations) project. LasDamas consists of a large suite of cosmological N-body simulations that follow the evolution of dark matter in the universe. The aim of LasDamas is to obtain adequate resolution in many large boxes, resulting in a huge volume appropriate for statistical studies of galaxies and halos. We measure density profiles for these halos, and fit NFW and other models to our measurements. With such a large dataset, we are able to study the full density profile distribution and its dependence on mass, redshift, and environment -- even in the regime of rare cluster-size halos. Finally, we investigate the sensitivity of our results to particle mass resolution, as well as choice of halo definition.

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