The WiggleZ Dark Energy Survey: joint measurements of the expansion and growth history at z < 1

CBChris BlakeSBSarah BroughMCMatthew CollessCCCarlos ContrerasWCWarrick Couch

Swinburne University of Technology · Australian Astronomical Observatory · +11 more institutions

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Abstract

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 D A(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)…

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Authors

26
  • CB
    Chris BlakeCorresponding

    Swinburne University of Technology

  • SB
    Sarah Brough

    Australian Astronomical Observatory

  • MC
    Matthew Colless

    Australian Astronomical Observatory

  • CC
    Carlos Contreras

    Swinburne University of Technology

  • WC
    Warrick Couch

    Swinburne University of Technology

Topics & keywords

Keywords
  • Dark energy
  • Redshift
  • Galaxy
  • Baryon acoustic oscillations
  • Cosmology
  • Baryon
  • Covariance
  • Monte Carlo method
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