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The WiggleZ Dark Energy Survey: constraining galaxy bias and cosmic growth with three-point correlation functions

Marín, Felipe A. and Forster, Karl and Martin, D. Christopher and Wyder, Ted K. (2013) The WiggleZ Dark Energy Survey: constraining galaxy bias and cosmic growth with three-point correlation functions. Monthly Notices of the Royal Astronomical Society, 432 (4). pp. 2654-2668. ISSN 0035-8711.

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Higher order statistics are a useful and complementary tool for measuring the clustering of galaxies, containing information on the non-Gaussian evolution and morphology of large-scale structure in the Universe. In this work we present measurements of the three-point correlation function (3PCF) for 187 000 galaxies in the WiggleZ spectroscopic galaxy survey. We explore the WiggleZ 3PCF scale and shape dependence at three different epochs z = 0.35, 0.55 and 0.68, the highest redshifts where these measurements have been made to date. Using N-body simulations to predict the clustering of dark matter, we constrain the linear and non-linear bias parameters of WiggleZ galaxies with respect to dark matter, and marginalize over them to obtain constraints on σ8(z), the variance of perturbations on a scale of 8 h^−1 Mpc and its evolution with redshift. These measurements of σ_8(z), which have 10–20 per cent accuracies, are consistent with the predictions of the Λ cold dark matter concordance cosmology and test this model in a new way.

Item Type:Article
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URLURL TypeDescription Paper
Forster, Karl0000-0001-5800-5531
Martin, D. Christopher0000-0002-8650-1644
Alternate Title:The WiggleZ Dark Energy Survey: constraining galaxy bias and cosmic growth with 3-point correlation functions
Additional Information:© 2013 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2013 March 22. Received 2013 March 22; in original form 2012 November 1. First published online: May 23, 2013. We thank Eyal Kazin for fruitful discussions and suggestions, and the anonymous referee for valuable comments and suggestions. We acknowledge financial support from the Australian Research Council through Discovery Project grants which have funded the positions of MP, GP, TD and FM. SMC acknowledges the support of the Australian Research Council through a QEII Fellowship. CB acknowledges the financial support of the ARC through a Future Fellowship award. We are also grateful for support from the Centre for All-sky Astrophysics, an Australian Research Council Centre of Excellence funded by grant CE11000102. The Galaxy Evolution Explorer (GALEX) is a NASA Small Explorer, launched in 2003 April. We gratefully acknowledge NASA’s support for construction, operation and science analysis for the GALEX mission, developed in cooperation with the Centre National d’Etudes Spatiales of France and the Korean Ministry of Science and Technology. Finally, the WiggleZ survey would not be possible without the dedicated work of the staff of the Australian Astronomical Observatory in the development and support of the AAOmega spectrograph, and the running of the AAT.
Group:Space Astrophysics Laboratory
Funding AgencyGrant Number
Australian Research CouncilCE110001020
Subject Keywords:methods: statistical – cosmological parameters – cosmology: observations – large-scale structure of – Universe
Issue or Number:4
Record Number:CaltechAUTHORS:20130807-115748472
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39803
Deposited By: Jason Perez
Deposited On:08 Aug 2013 14:15
Last Modified:09 Mar 2020 23:40

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