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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
The WiggleZ Dark Energy Survey: Mapping the distance-redshift relation with baryon acoustic oscillations
Monthly Notices of the Royal Astronomical Society, Volume 418, No. 3, Year 2011
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Description
We present measurements of the baryon acoustic peak at redshifts z= 0.44, 0.6 and 0.73 in the galaxy correlation function of the final data set of the WiggleZ Dark Energy Survey. We combine our correlation function with lower redshift measurements from the 6-degree Field Galaxy Survey and Sloan Digital Sky Survey, producing a stacked survey correlation function in which the statistical significance of the detection of the baryon acoustic peak is 4.9σ relative to a zero-baryon model with no peak. We fit cosmological models to this combined baryon acoustic oscillation (BAO) data set comprising six distance-redshift data points, and compare the results with similar cosmological fits to the latest compilation of supernovae (SNe) and cosmic microwave background (CMB) data. The BAO and SNe data sets produce consistent measurements of the equation-of-state w of dark energy, when separately combined with the CMB, providing a powerful check for systematic errors in either of these distance probes. Combining all data sets we determine w=-1.03 ± 0.08 for a flat universe, consistent with a cosmological constant model. Assuming dark energy is a cosmological constant and varying the spatial curvature, we find Ωk=-0.004 ± 0.006. © 2011 The Authors Monthly Notices of the Royal Astronomical Society © 2011 RAS.
Authors & Co-Authors
Blake, Chris A.
Australia, Hawthorn
Swinburne University of Technology
Kazin, Eyal A.
United States, New York
New York University
Beutler, Florian
Australia, Perth
International Centre for Radio Astronomy Research
Davis, Tamara M.
Australia, Brisbane
The University of Queensland
Denmark, Copenhagen
Københavns Universitet
Parkinson, David R.
Australia, Brisbane
The University of Queensland
Brough, Sarah
Australia
Australian Astronomical Observatory
Colless, Matthew
Australia
Australian Astronomical Observatory
Contreras, Carlos
Australia, Hawthorn
Swinburne University of Technology
Couch, Warrick J.
Australia, Hawthorn
Swinburne University of Technology
Croom, Scott M.
Australia, Sydney
The University of Sydney
Croton, Darren J.
Australia, Hawthorn
Swinburne University of Technology
Drinkwater, Michael J.
Australia, Brisbane
The University of Queensland
Forster, Karl G.
United States, Pasadena
California Institute of Technology
Gilbank, David G.
Canada, Waterloo
University of Waterloo
Gladders, Michael D.
United States, Chicago
The University of Chicago
Glazebrook, Karl G.
Australia, Hawthorn
Swinburne University of Technology
Jelliffe, Ben
Australia, Sydney
The University of Sydney
Jurek, Russell J.
Australia, Canberra
Commonwealth Scientific and Industrial Research Organisation
Li, I. Hui
Australia, Hawthorn
Swinburne University of Technology
Madore, Barry F.
United States, Pasadena
Carnegie Observatories
Martin, Dirk Christopher
United States, Pasadena
California Institute of Technology
Pimbblet, Kevin A.
Australia, Clayton
Monash University
Poole, Gregory B.
Australia, Hawthorn
Swinburne University of Technology
Pracy, Michael B.
Australia, Hawthorn
Swinburne University of Technology
Australia, Canberra
The Australian National University
Sharp, Rob G.
Australia
Australian Astronomical Observatory
Australia, Canberra
The Australian National University
Wisnioski, Emily
Australia, Hawthorn
Swinburne University of Technology
Woods, David
Canada, Vancouver
The University of British Columbia
Wyder, Ted K.
United States, Pasadena
California Institute of Technology
Yee, Howard K.C.
Canada, Toronto
University of Toronto
Statistics
Citations: 791
Authors: 29
Affiliations: 16
Identifiers
Doi:
10.1111/j.1365-2966.2011.19592.x
ISSN:
13652966
Study Design
Cross Sectional Study
Study Approach
Quantitative