Eccentricity Evolution in Simulated Galaxy Clusters
Abstract
Strong cluster eccentricity evolution for has appeared in a variety of observational data sets. We examine the evolution of eccentricity in simulated galaxy clusters using a variety of simulation methodologies, amplitude normalizations, and background cosmologies. We do not find find such evolution for in any of our simulation ensembles. We suggest a systematic error in the form of a redshift-dependent selection effect in cluster catalogs or missing physics in cluster simulations important enough to modify the cluster morphology.
Cite
@article{arxiv.astro-ph/0301547,
title = {Eccentricity Evolution in Simulated Galaxy Clusters},
author = {Stephen Floor and Adrian Melott and Christopher Miller and Greg Bryan},
journal= {arXiv preprint arXiv:astro-ph/0301547},
year = {2009}
}
Comments
Revised version to be published in ApJ. Moderate revisions, including additional N-body simulations with varying amplitude normalization and background matter density within OCDM and $\lambda$CDM scenarios reinforce our conclusion that observed clusters have recently relaxed much more rapidly than simulated ones