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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
The Atacama Cosmology Telescope: Cosmology from galaxy clusters detected via the Sunyaev-Zel'dovich effect
Astrophysical Journal, Volume 732, No. 1, Article 44, Year 2011
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Description
We present constraints on cosmological parameters based on a sample of Sunyaev-Zel'dovich-selected (SZ-selected) galaxy clusters detected in a millimeter-wave survey by the Atacama Cosmology Telescope. The cluster sample used in this analysis consists of nine optically confirmed high-mass clusters comprising the high-significance end of the total cluster sample identified in 455 deg2 of sky surveyed during 2008 at 148 GHz. We focus on the most massive systems to reduce the degeneracy between unknown cluster astrophysics and cosmology derived from SZ surveys. We describe the scaling relation between cluster mass and SZ signal with a four-parameter fit. Marginalizing over the values of the parameters in this fit with conservative priors gives σ8 = 0.851 ± 0.115 and w = -1.14 ± 0.35 for a spatially flat wCDM cosmological model with Wilkinson Microwave Anisotropy Probe (WMAP) seven-year priors on cosmological parameters. This gives a modest improvement in statistical uncertainty over WMAP seven-year constraints alone. Fixing the scaling relation between the cluster mass and SZ signal to a fiducial relation obtained from numerical simulations and calibrated by X-ray observations, we find σ8 = 0.821 ± 0.044 and w = -1.05 ± 0.20. These results are consistent with constraints from WMAP7 plus baryon acoustic oscillations plus Type Ia supernova which give σ8 = 0.802 ± 0.038 and w = -0.98 ± 0.053. A stacking analysis of the clusters in this sample compared to clusters simulated assuming the fiducial model also shows good agreement. These results suggest that, given the sample of clusters used here, both the astrophysics of massive clusters and the cosmological parameters derived from them are broadly consistent with current models. © 2011. The American Astronomical Society. All rights reserved.
Authors & Co-Authors
Sehgal, Neelima
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Trac, H. Y.
United States, Pittsburgh
Carnegie Mellon University
United States, Cambridge
Harvard University
Acquaviva, Viviana
United States, Princeton
Princeton University
United States, New Brunswick
Rutgers University–new Brunswick
Ade, Peter A.R.
United Kingdom, Cardiff
Cardiff University
Aguirre, Paula
Chile, Santiago
Pontificia Universidad Católica de Chile
Amiri, Mandana
Canada, Vancouver
The University of British Columbia
Appel, John William
United States, Princeton
Princeton University
Barrientos, F. Felipe
Chile, Santiago
Pontificia Universidad Católica de Chile
Battistelli, Elia Stefano
Canada, Vancouver
The University of British Columbia
Italy, Rome
Sapienza Università Di Roma
Bond, J. Richard
Canada, Toronto
L’institut Canadien D’astrophysique Théorique
Brown, Ben R.
United States, Pittsburgh
University of Pittsburgh
Burger, Bryce
Canada, Vancouver
The University of British Columbia
Chervenak, James A.
United States, Greenbelt
Nasa Goddard Space Flight Center
Das, Sudeep
United States, Princeton
Princeton University
United States, Berkeley
Lawrence Berkeley National Laboratory
Devlin, Mark J.
United States, Philadelphia
University of Pennsylvania
Dicker, Simon R.
United States, Philadelphia
University of Pennsylvania
Doriese, W. Bertrand
United States, Gaithersburg
National Institute of Standards and Technology
Dunkley, Joanna
United States, Princeton
Princeton University
United Kingdom, Oxford
University of Oxford
Dünner, Rolando
Chile, Santiago
Pontificia Universidad Católica de Chile
Essinger-Hileman, Thomas M.
United States, Princeton
Princeton University
Fisher, Ryan P.
United States, Princeton
Princeton University
Fowler, Joseph W.
United States, Gaithersburg
National Institute of Standards and Technology
Hajian, Amir
United States, Princeton
Princeton University
Canada, Toronto
L’institut Canadien D’astrophysique Théorique
Halpern, Mark
Canada, Vancouver
The University of British Columbia
Hasselfield, Matthew F.
Canada, Vancouver
The University of British Columbia
Hërnàndez-Monteagudo, Carlos
Germany, Garching Bei Munchen
Max Planck Institute for Astrophysics
Hilton, Gene C.
United States, Gaithersburg
National Institute of Standards and Technology
Hilton, Matt
South Africa, Durban
University of Kwazulu-natal
South Africa, Cape Town
Centre for High Performance Computing, Cape Town
Hincks, Adam D.
United States, Princeton
Princeton University
Hložek, Renée A.
United Kingdom, Oxford
University of Oxford
Holtz, Dave
United States, Princeton
Princeton University
Huffenberger, Kevin M.
United States, Coral Gables
University of Miami
Hughes, David Handel
Mexico, Puebla
Instituto Nacional de Astrofisica Optica y Electronica
Hughes, John P.
United States, New Brunswick
Rutgers University–new Brunswick
Infante, Leopoldo
Chile, Santiago
Pontificia Universidad Católica de Chile
Irwin, Kent D.
United States, Gaithersburg
National Institute of Standards and Technology
Jones, Andrew
United States, Princeton
Princeton University
Juin, Jean Baptiste
Chile, Santiago
Pontificia Universidad Católica de Chile
Klein, Jeffrey
United States, Philadelphia
University of Pennsylvania
Kosowsky, Arthur B.
United States, Pittsburgh
University of Pittsburgh
Lau, Judy M.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
United States, Princeton
Princeton University
United States, Palo Alto
Stanford University
Limon, Michele
United States, Princeton
Princeton University
United States, Philadelphia
University of Pennsylvania
United States, New York
Columbia University
Lin, Yen Ting
United States, Princeton
Princeton University
Chile, Santiago
Pontificia Universidad Católica de Chile
Japan, Tokyo
The University of Tokyo
Lupton, Robert H.
United States, Princeton
Princeton University
Marriage, Tobias A.
United States, Princeton
Princeton University
United States, Baltimore
Johns Hopkins University
Marsden, Danica W.
United States, Philadelphia
University of Pennsylvania
Martocci, Krista L.
United States, Princeton
Princeton University
United States, Chicago
The Kavli Institute for Cosmological Physics
Mauskopf, Phillip D.
United Kingdom, Cardiff
Cardiff University
Menanteau, Felipe
United States, New Brunswick
Rutgers University–new Brunswick
Moodley, Kavilan
South Africa, Durban
University of Kwazulu-natal
South Africa, Cape Town
Centre for High Performance Computing, Cape Town
Moseley, Harvey S.
United States, Greenbelt
Nasa Goddard Space Flight Center
Netterfield, C. Barth
Canada, Toronto
University of Toronto
Niemack, Michael D.
United States, Princeton
Princeton University
United States, Gaithersburg
National Institute of Standards and Technology
Nolta, Michael R.
Canada, Toronto
L’institut Canadien D’astrophysique Théorique
Page, Lyman A.
United States, Princeton
Princeton University
Parker, Lucas P.
United States, Princeton
Princeton University
Partridge, Bruce
United States, Haverford
Haverford College
Reid, Beth Ann
United States, Princeton
Princeton University
Spain, Barcelona
Universitat de Barcelona
Sherwin, Blake D.
United States, Princeton
Princeton University
Sievers, Jonathan L.
Canada, Toronto
L’institut Canadien D’astrophysique Théorique
Spergel, David N.
United States, Princeton
Princeton University
Staggs, Suzanne T.
United States, Princeton
Princeton University
Swetz, Daniel S.
United States, Philadelphia
University of Pennsylvania
United States, Gaithersburg
National Institute of Standards and Technology
Switzer, Eric R.
United States, Princeton
Princeton University
United States, Chicago
The Kavli Institute for Cosmological Physics
Thornton, Robert J.
United States, Philadelphia
University of Pennsylvania
United States, West Chester
West Chester University
Tucker, Carole E.
United Kingdom, Cardiff
Cardiff University
Warne, Ryan
South Africa, Durban
University of Kwazulu-natal
Wollack, Edward J.
United States, Greenbelt
Nasa Goddard Space Flight Center
Zhao, Yue
United States, Greenbelt
Nasa Goddard Space Flight Center
Statistics
Citations: 139
Authors: 69
Affiliations: 30
Identifiers
Doi:
10.1088/0004-637X/732/1/44
ISSN:
0004637X
e-ISSN:
15384357
Study Design
Cross Sectional Study
Study Approach
Quantitative