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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
The Atacama Cosmology Telescope: Physical properties and purity of a galaxy cluster sample selected via the Sunyaev-Zel'dovich effect
Astrophysical Journal, Volume 723, No. 2, Year 2010
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Description
We present optical and X-ray properties for the first confirmed galaxy cluster sample selected by the Sunyaev-Zel'dovich effect (SZE) from 148 GHz maps over 455 deg2 of sky made with the Atacama Cosmology Telescope (ACT). These maps, coupled with multi-band imaging on 4 m class optical telescopes, have yielded a sample of 23 galaxy clusters with redshifts between 0.118 and 1.066. Of these 23 clusters, 10 are newly discovered. The selection of this sample is approximately mass limited and essentially independent of redshift. We provide optical positions, images, redshifts, and X-ray fluxes and luminosities for the full sample, and X-ray temperatures of an important subset. The mass limit of the full sample is around 8.0 × 1014 M ⊙, with a number distribution that peaks around a redshift of 0.4. For the 10 highest significance SZE-selected cluster candidates, all of which are optically confirmed, the mass threshold is 1 × 1015 M⊙ and the redshift range is 0.167-1.066. Archival observations from Chandra, XMM-Newton, and ROSAT provide X-ray luminosities and temperatures that are broadly consistent with this mass threshold. Our optical follow-up procedure also allowed us to assess the purity of the ACT cluster sample. Eighty (one hundred) percent of the 148 GHz candidates with signal-to-noise ratios greater than 5.1 (5.7) are confirmed as massive clusters. The reported sample represents one of the largest SZE-selected sample of massive clusters over all redshifts within a cosmologically significant survey volume, which will enable cosmological studies as well as future studies on the evolution, morphology, and stellar populations in the most massive clusters in the universe. © 2010. The American Astronomical Society.
Authors & Co-Authors
Menanteau, Felipe
United States, New Brunswick
Rutgers University–new Brunswick
González, Jorge Nuevo
Chile, Santiago
Pontificia Universidad Católica de Chile
Juin, Jean Baptiste
Chile, Santiago
Pontificia Universidad Católica de Chile
Marriage, Tobias A.
United States, Princeton
Princeton University
Reese, Erik D.
United States, Philadelphia
University of Pennsylvania
Acquaviva, Viviana
United States, New Brunswick
Rutgers University–new Brunswick
United States, Princeton
Princeton University
Aguirre, Paula
Chile, Santiago
Pontificia Universidad Católica de Chile
Appel, John William
United States, Princeton
Princeton University
Barrientos, F. Felipe
Chile, Santiago
Pontificia Universidad Católica de Chile
Battistelli, Elia Stefano
Italy, Rome
Sapienza Università Di Roma
Bond, J. Richard
Canada, Toronto
L’institut Canadien D’astrophysique Théorique
Das, Sudeep
United States, Berkeley
University of California, Berkeley
Deshpande, Amruta J.
United States, New Brunswick
Rutgers University–new Brunswick
Devlin, Mark J.
United States, Philadelphia
University of Pennsylvania
Dicker, Simon R.
United States, Philadelphia
University of Pennsylvania
Dunkley, Joanna
United Kingdom, Oxford
University of Oxford
Dünner, Rolando
Chile, Santiago
Pontificia Universidad Católica de Chile
Essinger-Hileman, Thomas M.
United States, Princeton
Princeton University
Fowler, Joseph W.
United States, Princeton
Princeton University
Hajian, Amir
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, Matt
South Africa, Durban
University of Kwazulu-natal
Hincks, Adam D.
United States, Princeton
Princeton University
Hložek, Renée A.
United Kingdom, Oxford
University of Oxford
Huffenberger, Kevin M.
United States, Coral Gables
University of Miami
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
Klein, Jeffrey
United States, Philadelphia
University of Pennsylvania
Kosowsky, Arthur B.
United States, Pittsburgh
University of Pittsburgh
Lin, Yen Ting
Japan, Tokyo
The University of Tokyo
Marsden, Danica W.
United States, Philadelphia
University of Pennsylvania
Moodley, Kavilan
South Africa, Durban
University of Kwazulu-natal
Niemack, Michael D.
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
Sehgal, Neelima
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
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
Switzer, Eric R.
United States, Chicago
The Kavli Institute for Cosmological Physics
Thornton, Robert J.
United States, West Chester
West Chester University
Trac, H. Y.
United States, Cambridge
Harvard University
Warne, Ryan
South Africa, Durban
University of Kwazulu-natal
Wollack, Edward J.
United States, Greenbelt
Nasa Goddard Space Flight Center
Statistics
Citations: 91
Authors: 50
Affiliations: 21
Identifiers
Doi:
10.1088/0004-637X/723/2/1523
ISSN:
0004637X
e-ISSN:
15384357
Study Design
Cross Sectional Study
Cohort Study
Study Approach
Quantitative