Chandra Observations of a Galaxy Cluster at Z=1.11

Mathematics – Logic

Scientific paper

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Chandra Proposal Id #03800884

Scientific paper

We propose a 45 ksec exposure with ACIS-I of the narrow-lined radio galaxy MG0442+0202 at z=1.11 and its associated cluster, one of the most distant galaxy clusters known. The system has been detected in archival ROSAT data, which we argue is dominted by emission from hot intracluster gas. The spatial and energy resolution of Chandra will be critical for these observations: we expect to see unresolved X-ray emission from the AGN embedded within diffuse, soft X-ray emission from the cluster ICM. Observations of the radio galaxy will provide basic data for AGN unification schemes. Observations of the cluster ICM will conclusively demonstrate the existence of a massive, bound structure and allow us to probe the cosmologically-informative L-T relation at early cosmic epoch.

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