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26 April 2024 |
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Article overview
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The WiggleZ Dark Energy Survey: constraining galaxy bias and cosmic growth with 3-point correlation functions | | Felipe Marin
; Chris Blake
; Gregory Poole
; Cameron McBride
; Sarah Brough
; Matthew Colless
; Warrick Couch
; Scott Croom
; Darren Croton
; Tamara M. Davis
; Michael J. Drinkwater
; Karl Forster
; David Gilbank
; Mike Gladders
; Karl Glazebrook
; Ben Jelliffe
; Russell J. Jurek
; I-hui Li
; Barry Madore
; D. Christopher Martin
; Kevin Pimbblet
; Michael Pracy
; Rob Sharp
; Emily Wisnioski
; David Woods
; Ted K. Wyder
; H.K.C. Yee
; | | Date: |
26 Mar 2013 | | Abstract: | 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 marginalise over them to obtain constraints on sigma_8(z), the
variance of perturbations on a scale of 8 Mpc/h and its evolution with
redshift. These measurements of sigma_8(z), which have 10-20% accuracies, are
consistent with the predictions of the LCDM concordance cosmology and test this
model in a new way. | | Source: | arXiv, 1303.6644 | | Services: | Forum | Review | PDF | Favorites | |
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