A SUNYAEV-ZEL'DOVICH-SELECTED SAMPLE OF THE MOST MASSIVE GALAXY CLUSTERS IN THE 2500 deg2SOUTH POLE TELESCOPE SURVEY
Year: 2011
Type: article
Abstract: The South Pole Telescope (SPT) is currently surveying 2500 deg 2 of the southern sky to detect massive galaxy clusters out to the epoch of their formation using the Sunyaev–Zel'dovich (SZ) effect. This paper presents a catalog of the 26 most significant SZ cluster detections in the full survey region. The catalog includes 14 clusters which have been previously identified and 12 that are new discoveries. These clusters were identified in fields observed to two differing noise depths: 1500 deg 2 at the final SPT survey depth of 18 μK arcmin at 150 GHz and 1000 deg 2 at a depth of 54 μK arcmin. Clusters were selected on the basis of their SZ signal-to-noise ratio (S/N) in SPT maps, a quantity which has been demonstrated to correlate tightly with cluster mass. The S/N thresholds were chosen to achieve a comparable mass selection across survey fields of both depths. Cluster redshifts were obtained with optical and infrared imaging and spectroscopy from a variety of ground- and space-based facilities. The redshifts range from 0.098 ⩽ z ⩽ 1.132 with a median of z med = 0.40. The measured SZ S/N and redshifts lead to unbiased mass estimates ranging from 9.8 × 10 14 M ☉ h −1 70 ⩽ M 200 (ρ mean ) ⩽ 3.1 × 10 15 M ☉ h −1 70 . Based on the SZ mass estimates, we find that none of the clusters are individually in significant tension with the ΛCDM cosmological model. We also test for evidence of non-Gaussianity based on the cluster sample and find the data show no preference for non-Gaussian perturbations.
Source: The Astrophysical Journal
Authors: R. Williamson, B. A. Benson, F. W. High, K. Vanderlinde, P. A. R. Ade, K. A. Aird, K. Andersson, R. Armstrong, M. L. N. Ashby, M. Bautz, G. Bazin, E. Bertin, L. E. Bleem, M. Bonamente, M. Brodwin, J. E. Carlstrom, C. L. Chang, S. C. Chapman, A. Clocchiatti, T. M. Crawford, A. T. Crites, T. de Haan, S. Desai, M. A. Dobbs, J. P. Dudley, G. G. Fazio, R. J. Foley, W. R. Forman, G. Garmire, E. M. George, M. D. Gladders, A. H. Gonzalez, N. W. Halverson, G. P. Holder, W. L. Holzapfel, S. Hoover, J. D. Hrubes, C. Jones, M. Joy, R. Keisler, L. Knox, A. T. Lee, E. M. Leitch, M. Lueker, D. Luong-Van, D. P. Marrone, J. J. McMahon, J. Mehl, S. S. Meyer, J. J. Mohr, T. E. Montroy, S. S. Murray, S. Padin, T. Plagge, C. Pryke, C. L. Reichardt, A. Rest, J. Ruel, J. E. Ruhl, B. R. Saliwanchik, A. Saro, K. K. Schaffer, L. Shaw, E. Shirokoff, J. Song, H. G. Spieler, B. Stalder, S. A. Stanford, Z. Staniszewski, A. A. Stark, K. Story, C. W. Stubbs, J. D. Vieira, A. Vikhlinin, A. Zenteno
Institutions: University of Chicago, McGill University, Cardiff University, Massachusetts Institute of Technology, Ludwig-Maximilians-Universität München, University of Illinois Urbana-Champaign, National Center for Supercomputing Applications, Center for Astrophysics Harvard & Smithsonian, Excellence Cluster Universe, Centre National de la Recherche Scientifique, Institut d'Astrophysique de Paris, Université Pierre-et-Marie-Curie, Marshall Space Flight Center, Argonne National Laboratory, University of Cambridge, Pontificia Universidad Católica de Chile, Pennsylvania State University, University of California, Berkeley, University of Florida, University of Colorado Boulder, University of California, Davis, Lawrence Berkeley National Laboratory, University of Michigan, Max Planck Institute for Extraterrestrial Physics, Case Western Reserve University, California Institute of Technology, Space Telescope Science Institute, Harvard University, Art Institute of Chicago, School of the Art Institute of Chicago, Yale University
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Funders: National Science Foundation, Smithsonian Institution, National Aeronautics and Space Administration, W. M. Keck Foundation, Gordon and Betty Moore Foundation, Massachusetts Institute of Technology, California Institute of Technology, University of Chicago, McGill University, Deutsche Forschungsgemeinschaft, Canada Research Chairs, Jet Propulsion Laboratory, Smithsonian Astrophysical Observatory, Kavli Institute for Cosmological Physics, University of Chicago, Science and Technology Facilities Council
Awards: Center for Cosmological Physics, G1390571956, Development of a Parallel Imager for Southern Cosmology Observations: Time Evolution of Dark Energy, G3561758408, G3815726687, Cosmological Research with the 10 meter South Pole Telescope, G5780980149, G7546998831, Collaborative Research: Optical Confirmation, Redshifts, and Richness for Galaxy Clusters Discovered with the South Pole Telescope, Collaborative Research: Optical Confirmation, Redshifts, and Richness for Galaxy Clusters Discovered with the South Pole Telescope
OpenAlex ID: W2167755706