Eccentricity Evolution in Simulated Galaxy Clusters

Details Eccentricity Evolution in Simulated Galaxy Clusters Eccentricity Evolution in Simulated Galaxy Clusters

2003-01-28

arxiv.org/abs/astro-ph/0301547v3

Astrophys.J. 591 (2003) 741-748

Astronomy and Astrophysics

Astrophysics

Revised version to be published in ApJ. Moderate revisions, including additional N-body simulations with varying amplitude nor

Scientific paper

10.1086/375493

Strong cluster eccentricity evolution for $z \le 0.13$ 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 $z < 0.1$ 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.

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