The WiggleZ Dark Energy Survey: constraining galaxy bias and cosmic growth with 3-point correlation functions
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...
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| creator | Marin, Felipe Blake, Chris Poole, Gregory McBride, Cameron Brough, Sarah Colless, Matthew Couch, Warrick Croom, Scott Croton, Darren Davis, Tamara M Drinkwater, Michael J ster, Karl Gilbank, David Gladders, Mike Glazebrook, Karl Jelliffe, Ben Jurek, Russell J I-hui, Li Madore, Barry Martin, D Christopher Pimbblet, Kevin Pracy, Michael Sharp, Rob Wisnioski, Emily Woods, David Wyder, Ted K Yee, H K C |
| description | 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. |
| doi_str_mv | 10.48550/arxiv.1303.6644 |
| format | Article |
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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. 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| source | arXiv.org; Open Access: Freely Accessible Journals by multiple vendors |
| subjects | Bias Clustering Computer simulation Correlation analysis Cosmology Dark energy Dark matter Dependence Galactic evolution Galaxies Large scale structure of the universe Model testing Morphology Physics - Cosmology and Nongalactic Astrophysics Red shift Sky surveys (astronomy) Stars & galaxies Universe |
| title | The WiggleZ Dark Energy Survey: constraining galaxy bias and cosmic growth with 3-point correlation functions |
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