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

Open access
Blake, Chris, Brough, Sarah, Colless, Matthew, Contreras, Carlos, Couch, Warrick, Croom, Scott, Croton, Darren, Davis, Tamara M., Drinkwater, Michael J., Forster, Karl, Gilbank, David, Gladders, Mike, Glazebrook, Karl, Jelliffe, Ben, Jurek, Russell J., Li, I-hui, Madore, Barry, Martin, D. Christopher, Pimbblet, Kevin, Poole, Gregory B., Pracy, Michael, Sharp, Rob, Wisnioski, Emily, Woods, David, Wyder, Ted K., Yee, H. K. C.·2012·Monthly Notices of the Royal Astronomical Society

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) km/s/Mpc at these three redshifts. Further combining our results with other baryon acoustic oscillation and distant supernovae datasets, we use a Monte Carlo Markov Chain technique to determine the evolution of the Hubble parameter H(z) as a stepwise function in 9 redshift bins of width dz = 0.1, also marginalizing over the spatial curvature. Our measurements of H(z), which have precision better than 7% 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.

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Crossref · 10.1111/j.1365-2966.2012.21473.x

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Metadata

Authors
Blake, C., Brough, S., Colless, M., Contreras, C., Couch, W., Croom, S., Croton, D., Davis, T. M., Drinkwater, M. J., Forster, K., Gilbank, D., Gladders, M., Glazebrook, K., Jelliffe, B., Jurek, R. J., Li, I.-H., Madore, B., Martin, D. C., Pimbblet, K., Poole, G. B., Pracy, M., Sharp, R., Wisnioski, E., Woods, D., Wyder, T. K., & Yee, H. K. C.
Venue
Monthly Notices of the Royal Astronomical Society
Published
2012-07-19
Volume
425
Issue
1
Pages
405-414
ISSN
0035-8711 (ISSN-L)
OpenAlex
W1963276504
Cited by
927
References
40
FWCI
26.93
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: The WiggleZ Dark Energy Survey: joint measurements of the expansion and growth history at z< 1: WiggleZ Survey: expansion history. https://app.cochat.ai/papers/10.1111/j.1365-2966.2012.21473.x
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Blake, C., Brough, S., Colless, M., Contreras, C., Couch, W., Croom, S., Croton, D., Davis, T. M., Drinkwater, M. J., Forster, K., Gilbank, D., Gladders, M., Glazebrook, K., Jelliffe, B., Jurek, R. J., Li, I.-H., Madore, B., Martin, D. C., Pimbblet, K., . . . Yee, H. K. C. (2012). The WiggleZ Dark Energy Survey: joint measurements of the expansion and growth history at z< 1: WiggleZ Survey: expansion history. Monthly Notices of the Royal Astronomical Society. https://doi.org/10.1111/j.1365-2966.2012.21473.x

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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