Merging Substructures in Nearby Clusters of Galaxies

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Chandra Proposal Id #01800216

Scientific paper

We propose to image a nearby rich double cluster of galaxies, A3125/A3128, with HRC-I. Ground-based optical imaging and spectroscopy, along with a ROSAT PSPC pointed observation, has established that there are at least two major mergers of subclusters ongoing in A3125/A3128 at present. Thus this double cluster represents a particularly favorable case for studying the way in which merging of substructures proceeds in the rich cluster environment. Our goal is to use the high spatial resolution of AXAF to resolve shocks and other transient disturbances in the hot intracluster medium (ICM) of A3125/A3128. These disturbances in the ICM should provide crucial information towards developing a comprehensive picture of the cluster merger phenomenon.

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