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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
The WiggleZ Dark Energy Survey: Joint measurements of the expansion and growth history at z < 1
Monthly Notices of the Royal Astronomical Society, Volume 425, No. 1, Year 2012
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Description
We perform a joint determination of the distance-redshift relation and cosmic expansion rate at redshifts z = 0.44, 0.6 and 0.73 by combining measurements of the baryon acoustic peak and Alcock-Paczynski distortion from galaxy clustering in the WiggleZ Dark Energy Survey, using a large ensemble of mock catalogues to calculate the covariance between the measurements. We find that DA(z) = (1205 ± 114, 1380 ± 95, 1534 ± 107)Mpc and H(z) = (82.6 ± 7.8, 87.9 ± 6.1, 97.3 ± 7.0)kms-1Mpc-1 at these three redshifts. Further combining our results with other baryon acoustic oscillation and distant supernovae data sets, we use a Monte Carlo Markov Chain technique to determine the evolution of the Hubble parameter H(z) as a stepwise function in nine redshift bins of width Δz = 0.1, also marginalizing over the spatial curvature. Our measurements of H(z), which have precision better than 7 per cent in most redshift bins, are consistent with the expansion history predicted by a cosmological constant dark energy model, in which the expansion rate accelerates at redshift z < 0.7. © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS.
Authors & Co-Authors
Blake, Chris A.
Australia, Hawthorn
Swinburne University of Technology
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
Davis, Tamara M.
Australia, Brisbane
The University of Queensland
Drinkwater, Michael J.
Australia, Brisbane
The University of Queensland
Forster, Karl G.
United States, Pasadena
California Institute of Technology
Gilbank, David G.
South Africa, Cape Town
South African Astronomical Observatory
Gladders, Michael D.
United States, Chicago
The Department of Astronomy and Astrophysics, 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, Sydney
Australia Telescope National Facility
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, Sydney
The University of Sydney
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: 697
Authors: 26
Affiliations: 13
Identifiers
Doi:
10.1111/j.1365-2966.2012.21473.x
ISSN:
00358711
e-ISSN:
13652966
Study Design
Cross Sectional Study
Study Approach
Quantitative