Mapping an Unusually Relaxed Non-Cool-Core Cluster Out to be the Virial Radius

Almost all existing observations covering cluster outskirts are of cool]core clusters. Non-cool-core clusters are dynamically younger than cool core clusters and are expected to have a more clumpy intracluster medium, and therefore serve as more potent testbeds for the favored clumpy gas model. We propose a Chandra observation of a non-cool-core cluster, Abell 586, that is still dynamically younger than cool-core clusters but unusually relaxed. It resides at an intermediate redshift allowing its cluster entropy profile to be definitively determined out to its virial radius with a single ACIS-I pointing. If this observation of a non-cool-core cluster does not find evidence for clumpy gas near the virial radius, it would pose a serious challenge to the currently favored model.