Optical-X-ray Study of the Galaxy Cluster 1E 0657

Details Optical-X-ray Study of the Galaxy Cluster 1E 0657 Optical-X-ray Study of the Galaxy Cluster 1E 0657

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...198.0706r&link_type=abstract

American Astronomical Society, 198th AAS Meeting, #07.06; Bulletin of the American Astronomical Society, Vol. 33, p.796

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Optical-Xray Study of the Galaxy Cluster 1E 0657-56 The results of optical and x-ray observations of the cluster 1E 0657-56 are discussed. 1E 0657-56, with a temperature of approximately 15 keV is one of the hottest known clusters, and, as such, could impose strong constraints on cosmological models for structure formation. Using the WFCCD camera on the DuPont 2.5 meter telescope at the Las Campanas Observatory, we obtained redshifts for 50 galaxies and gravitational arcs. We use these data to identify cluster members, and to investigate the possibility that a subcluster is merging with the primary cluster, as indicated by the x-ray data. These redshifts, together with the gravitational arc data and Chandra x-ray observations allow us to make 3 independent estimates of the mass of the cluster, and to assess the consequences for models of galaxy cluster formation.

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