Cusps in CDM halos: The density profile of a billion particle halo Export

@misc{citeulike:248336, abstract = {We resolve the inner region of a massive cluster forming in a cosmological LambdaCDM simulation with a mass resolution of up to 3x10^5 Msun. This is a billion times less than the clusters virial mass and is about two orders of magnitude better than the current highest resolution LCDM simulations. We achieve this resolution using a new multi-mass refinement procedure and are now able to probe a dark matter halo density profile down to 0.1 percent of the virial radius. The inner density profile of this cluster halo is well fitted by a power-law rho \~{} r^-gamma down to the smallest resolved scale. An inner region with constant logarithmic slope is now resolved, which indicates that cuspy profiles describe the inner profile better than recently proposed profiles with a core. For this cluster the inner slope is about gamma = 1.2, close to the medium value in a sample of six high resolution cluster simulations of Diemand et al.2004.}, archivePrefix = {arXiv}, author = {Diemand, Juerg and Zemp, Marcel and Moore, Ben and Stadel, Joachim and Carollo, Marcella}, citeulike-article-id = {248336}, citeulike-linkout-0 = {http://arxiv.org/abs/astro-ph/0504215}, citeulike-linkout-1 = {http://arxiv.org/pdf/astro-ph/0504215}, day = {8}, eprint = {astro-ph/0504215}, keywords = {0-meeting-2005-marseille, caustic, cosmo}, month = {Apr}, posted-at = {2005-07-07 09:53:49}, priority = {0}, title = {Cusps in CDM halos: The density profile of a billion particle halo}, url = {http://arxiv.org/abs/astro-ph/0504215}, year = {2005} }

TY - ELEC ID - citeulike:248336 L3 - citeulike-article-id:248336 N2 - We resolve the inner region of a massive cluster forming in a cosmological LambdaCDM simulation with a mass resolution of up to 3x10^5 Msun. This is a billion times less than the clusters virial mass and is about two orders of magnitude better than the current highest resolution LCDM simulations. We achieve this resolution using a new multi-mass refinement procedure and are now able to probe a dark matter halo density profile down to 0.1 percent of the virial radius. The inner density profile of this cluster halo is well fitted by a power-law rho ~ r^-gamma down to the smallest resolved scale. An inner region with constant logarithmic slope is now resolved, which indicates that cuspy profiles describe the inner profile better than recently proposed profiles with a core. For this cluster the inner slope is about gamma = 1.2, close to the medium value in a sample of six high resolution cluster simulations of Diemand et al.2004. TI - Cusps in CDM halos: The density profile of a billion particle halo KW - 0-meeting-2005-marseille KW - caustic KW - cosmo AU - Diemand, Juerg AU - Zemp, Marcel AU - Moore, Ben AU - Stadel, Joachim AU - Carollo, Marcella PY - 2005/Apr/08/ UR - http://arxiv.org/abs/astro-ph/0504215 ER -