The WiggleZ Dark Energy Survey: Mapping the distance-redshift relation with baryon acoustic oscillations

Blake, Chris, Kazin, Eyal A., Beutler, Florian, Davis, Tamara M., Parkinson, David, Brough, Sarah, Colless, Matthew, Contreras, Carlos, Couch, Warwick, Croom, Scott, Croton, Darren, 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. and Yee, H. K. C. (2011) The WiggleZ Dark Energy Survey: Mapping the distance-redshift relation with baryon acoustic oscillations. Monthly Notices of the Royal Astronomical Society, 418 3: 1707-1724. doi:10.1111/j.1365-2966.2011.19592.x


Author Blake, Chris
Kazin, Eyal A.
Beutler, Florian
Davis, Tamara M.
Parkinson, David
Brough, Sarah
Colless, Matthew
Contreras, Carlos
Couch, Warwick
Croom, Scott
Croton, Darren
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.
Title The WiggleZ Dark Energy Survey: Mapping the distance-redshift relation with baryon acoustic oscillations
Journal name Monthly Notices of the Royal Astronomical Society   Check publisher's open access policy
ISSN 0035-8711
1365-2966
Publication date 2011-12-01
Sub-type Article (original research)
DOI 10.1111/j.1365-2966.2011.19592.x
Open Access Status DOI
Volume 418
Issue 3
Start page 1707
End page 1724
Total pages 18
Place of publication Oxford, United Kingdom
Publisher Oxford University Press
Collection year 2012
Language eng
Formatted abstract
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.
Keyword Surveys
Cosmological parameters
Distance scale
Large-scale structure of Universe
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2012 Collection
 
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