The WiggleZ Dark Energy Survey: measuring the cosmic growth rate with the two-point galaxy correlation function

Contreras, Carlos, Blake, Chris, Poole, Gregory B., Marin, Felipe, Brough, Sarah, Colless, Matthew, 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, Pracy, Michael, Sharp, Rob, Wisnioski, Emily, Woods, David, Wyder, Ted K. and Yee, H. K. C. (2013) The WiggleZ Dark Energy Survey: measuring the cosmic growth rate with the two-point galaxy correlation function. Monthly Notices of the Royal Astronomical Society, 430 2: 924-933. doi:10.1093/mnras/sts608

Author Contreras, Carlos
Blake, Chris
Poole, Gregory B.
Marin, Felipe
Brough, Sarah
Colless, Matthew
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
Pracy, Michael
Sharp, Rob
Wisnioski, Emily
Woods, David
Wyder, Ted K.
Yee, H. K. C.
Title The WiggleZ Dark Energy Survey: measuring the cosmic growth rate with the two-point galaxy correlation function
Journal name Monthly Notices of the Royal Astronomical Society   Check publisher's open access policy
ISSN 0035-8711
Publication date 2013-04
Year available 2013
Sub-type Article (original research)
DOI 10.1093/mnras/sts608
Open Access Status DOI
Volume 430
Issue 2
Start page 924
End page 933
Total pages 10
Place of publication Oxford, United Kingdom
Publisher Oxford University Press
Collection year 2014
Language eng
Formatted abstract
The growth history of large-scale structure in the Universe is a powerful probe of the cosmological model, including the nature of dark energy. We study the growth rate of cosmic structure to redshift z = 0.9 using more than 162 000 galaxy redshifts from the WiggleZ Dark Energy Survey. We divide the data into four redshift slices with effective redshifts z = [0.2, 0.4, 0.6, 0.76] and in each of the samples measure and model the two-point galaxy correlation function in parallel and transverse directions to the line of sight. After simultaneously fitting for the galaxy bias factor we recover values for the cosmic growth rate which are consistent with our assumed Λcold dark matter (ΛCDM) input cosmological model, with an accuracy of around 20 per cent in each redshift slice. We investigate the sensitivity of our results to the details of the assumed model and the range of physical scales fitted, making close comparison with a set of N-body simulations for calibration. Our measurements are consistent with an independent power-spectrum analysis of a similar data set, demonstrating that the results are not driven by systematic errors. We determine the pairwise velocity dispersion of the sample in a non-parametric manner, showing that it systematically increases with decreasing redshift, and investigate the Alcock-Paczynski effects of changing the assumed fiducial model on the results. Our techniques should prove useful for current and future galaxy surveys mapping the growth rate of structure using the two-dimensional correlation function.
Keyword Surveys
Cosmological parameters
Largescale structure of Universe
Luminous Red Galaxies
Redshift Survey
Cosmological Constant
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 2014 Collection
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Citation counts: TR Web of Science Citation Count  Cited 19 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 20 times in Scopus Article | Citations
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