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Date and Time of the Query: 2019-07-24 T03:24:53 PDT
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For refcode 2002ApJ...581...53R:
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Copyright by American Astronomical Society. Reproduced by permission
2002ApJ...581...53R Determining the Cosmic Distance Scale from Interferometric Measurements of the Sunyaev-Zeldovich Effect Erik D. Reese, John E. Carlstrom, Marshall Joy, Joseph J. Mohr, Laura Grego, and William L. Holzapfel Received 2002 May 16; accepted 2002 August 9 ABSTRACT We determine the distances to 18 galaxy clusters with redshifts ranging from z ~ 0.14 to 0.78 from a maximum likelihood joint analysis of 30 GHz interferometric Sunyaev-Zeldovich effect (SZE) and X-ray observations. We model the intracluster medium (ICM) using a spherical isothermal {beta} model. We quantify the statistical and systematic uncertainties inherent to these direct distance measurements, and we determine constraints on the Hubble parameter for three different cosmologies. These distances imply a Hubble constant of 60_-4-18_^+4+13^ km s^-1^ Mpc^-1^ for an {OMEGA}_M_ = 0.3, {OMEGA}_{LAMBDA}_ = 0.7 cosmology, where the uncertainties correspond to statistical followed by systematic at 68% confidence. With a sample of 18 clusters, systematic uncertainties clearly dominate. The systematics are observationally approachable and will be addressed in the coming years through the current generation of X-ray satellites (Chandra and XMM-Newton) and radio observatories (Owens Valley Radio Observatory, Berkeley-Illinois-Maryland Association, and Very Large Array). Analysis of high-redshift clusters detected in future SZE and X-ray surveys will allow a determination of the geometry of the universe from SZE-determined distances. Subject headings: cosmic microwave background - cosmology: observations - distance scale - galaxies: clusters: general - techniques: interferometric
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