The WiggleZ Dark Energy Survey: The selection function and z=0.6 galaxy power spectrum

Blake, Chris, Brough, Sarah, Colless, Matthew, Couch, Warrick, Croom, Scott, Davis, Tamara, Drinkwater, Michael J., Forster, Karl, Glazebrook, Karl, Jelliffe, Ben, Jurek, Russell J., Li, I-Hui, Madore, Barry, Martin, Chris, Pimbblet, Kevin, Poole, Gregory B., Pracy, Michael, Sharp, Rob, Wisnioski, Emily, Woods, David and Wyder, Ted (2010) The WiggleZ Dark Energy Survey: The selection function and z=0.6 galaxy power spectrum. Monthly Notices of the Royal Astronomical Society, 406 2: 803-821. doi:10.1111/j.1365-2966.2010.16747.x


Author Blake, Chris
Brough, Sarah
Colless, Matthew
Couch, Warrick
Croom, Scott
Davis, Tamara
Drinkwater, Michael J.
Forster, Karl
Glazebrook, Karl
Jelliffe, Ben
Jurek, Russell J.
Li, I-Hui
Madore, Barry
Martin, Chris
Pimbblet, Kevin
Poole, Gregory B.
Pracy, Michael
Sharp, Rob
Wisnioski, Emily
Woods, David
Wyder, Ted
Title The WiggleZ Dark Energy Survey: The selection function and z=0.6 galaxy power spectrum
Journal name Monthly Notices of the Royal Astronomical Society   Check publisher's open access policy
ISSN 0035-8711
1365-2966
Publication date 2010-08
Sub-type Article (original research)
DOI 10.1111/j.1365-2966.2010.16747.x
Open Access Status DOI
Volume 406
Issue 2
Start page 803
End page 821
Total pages 19
Place of publication Oxford, United Kingdom
Publisher Oxford University Press
Collection year 2011
Language eng
Formatted abstract
We report one of the most accurate measurements of the three-dimensional large-scale galaxy power spectrum achieved to date, using 56 159 redshifts of bright emission-line galaxies at effective redshift z ≈ 0.6 from the WiggleZ Dark Energy Survey at the Anglo-Australian Telescope. We describe in detail how we construct the survey selection function allowing for the varying target completeness and redshift completeness. We measure the total power with an accuracy of approximately 5 per cent in wavenumber bands of Δk = 0.01 h Mpc-1. A model power spectrum including non-linear corrections, combined with a linear galaxy bias factor and a simple model for redshift-space distortions, provides a good fit to our data for scales k < 0.4 h Mpc-1. The large-scale shape of the power spectrum is consistent with the best-fitting matter and baryon densities determined by observations of the cosmic microwave background radiation. By splitting the power spectrum measurement as a function of tangential and radial wavenumbers, we delineate the characteristic imprint of peculiar velocities. We use these to determine the growth rate of structure as a function of redshift in the range 0.4 < z < 0.8, including a data point at z = 0.78 with an accuracy of 20 per cent. Our growth rate measurements are a close match to the self-consistent prediction of the Λ cold dark matter model. The WiggleZ survey data will allow a wide range of investigations into the cosmological model, cosmic expansion and growth history, topology of cosmic structure and Gaussianity of the initial conditions. Our calculation of the survey selection function will be released at a future date via our website wigglez.swin.edu.au. © 2010 The Authors. Journal compilation © 2010 RAS.
Keyword Surveys
Cosmological parameters
Large-scale structure of Universe
Digital sky survey
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 2011 Collection
 
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Created: Sun, 29 Aug 2010, 00:01:52 EST