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For refcode 2000ApJ...544..109M:
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2000ApJ...544..109M The X-Ray Size-Temperature Relation for Intermediate-Redshift Galaxy Clusters Joseph J. Mohr, Erik D. Reese, E. Ellingson, Aaron D. Lewis, and August E. Evrard Received 2000 April 7; accepted 2000 June 28 ABSTRACT We present the first measurements of the X-ray size-temperature (ST) relation in intermediate-redshift (z ~ 0.30) galaxy clusters. We interpret the local ST relation (z ~ 0.06) in terms of underlying scaling relations in the cluster dark matter properties, and then we use standard models for the redshift evolution of those dark matter properties to argue that the ST relation does not evolve with redshift. We then use ROSAT HRI observations of 11 clusters to examine the intermediate-redshift ST relation; for currently favored cosmological parameters, the intermediate-redshift ST relation is consistent with that of local clusters. Finally, we use the ST relation and our evolution model to measure angular diameter distances; with these 11 distances we evaluate constraints on {OMEGA}_M_ and {OMEGA}_{LAMBDA}_ that are consistent with those derived from studies of Type Ia supernovae. The data rule out a model with {OMEGA}_M_ = 1 and {OMEGA}_{LAMBDA}_ = 0 with 2.5 {sigma} confidence. When limited to models where {OMEGA}_M_ + {OMEGA}+{LAMBDA}_ = 1, these data are inconsistent with {OMEGA}_M_ = 1 with 3 {sigma} confidence. Subject headings: cosmology: miscellaneous-galaxies: clusters: general- intergalactic medium
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