Measuring the 2D baryon acoustic oscillation signal of galaxies in WiggleZ: cosmological constraints

Hinton, Samuel R., Kazin, Eyal, Davis, Tamara M., Blake, Chris, Brough, Sarah, Colless, Matthew, Couch, Warrick J., Drinkwater, Michael J., Glazebrook, Karl, Jurek, Russell J., Parkinson, David, Pimbblet, Kevin A., Poole, Gregory B., Pracy, Michael and Woods, David (2017) Measuring the 2D baryon acoustic oscillation signal of galaxies in WiggleZ: cosmological constraints. Monthly Notices of the Royal Astronomical Society, 464 4: 4807-4822. doi:10.1093/mnras/stw2725

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Author Hinton, Samuel R.
Kazin, Eyal
Davis, Tamara M.
Blake, Chris
Brough, Sarah
Colless, Matthew
Couch, Warrick J.
Drinkwater, Michael J.
Glazebrook, Karl
Jurek, Russell J.
Parkinson, David
Pimbblet, Kevin A.
Poole, Gregory B.
Pracy, Michael
Woods, David
Title Measuring the 2D baryon acoustic oscillation signal of galaxies in WiggleZ: cosmological constraints
Journal name Monthly Notices of the Royal Astronomical Society   Check publisher's open access policy
ISSN 1365-2966
Publication date 2017-03-01
Sub-type Article (original research)
DOI 10.1093/mnras/stw2725
Open Access Status File (Publisher version)
Volume 464
Issue 4
Start page 4807
End page 4822
Total pages 16
Place of publication Oxford, United Kingdom
Publisher Oxford University Press
Collection year 2018
Language eng
Formatted abstract
We present results from the 2D anisotropic baryon acoustic oscillation (BAO) signal present in the final data set from the WiggleZ Dark Energy Survey. We analyse the WiggleZ data in two ways: first using the full shape of the 2D correlation function and secondly focusing only on the position of the BAO peak in the reconstructed data set. When fitting for the full shape of the 2D correlation function we use a multipole expansion to compare with theory. When we use the reconstructed data we marginalize over the shape and just measure the position of the BAO peak, analysing the data in wedges separating the signal along the line of sight from that parallel to the line of sight. We verify our method with mock data and find the results to be free of bias or systematic offsets. We also redo the pre-reconstruction angle-averaged (1D) WiggleZ BAO analysis with an improved covariance and present an updated result. The final results are presented in the form of Ωc h2, H(z), and DA(z) for three redshift bins with effective redshifts z=0.44, 0.60, and 0.73.Within these bins and methodologies, we recover constraints between 5 and 22 per cent error. Our cosmological constraints are consistent with flat ΛCDM cosmology and agree with results from the Baryon Oscillation Spectroscopic Survey.
Keyword Cosmological parameters
Dark energy
Large-scale structure of Universe
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

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