High-order clustering of WiggleZ galaxies

7th International Conference on Gravitation and Cosmology

Marín, F.A.^1

Centre for Astrophysics and Supercomputing, Swinburne University of Technology, PO Box 218, Hawthorn, VIC 3122, Australia^1

关键词: Complementary tools;    Correlation function;    High order statistics;    High-order;    Large structures;    N-body simulation;    Non-Gaussian;    Nonlinear bias;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/484/1/012038/pdf
DOI  :  10.1088/1742-6596/484/1/012038

来源: IOP

【 摘 要 】

High-order statistics are a useful and complementary tool for measuring the clustering of galaxies, containing information on the non-Gaussian evolution and morphology of the large structures in the Universe. In this work, we have presented results of the 3-point correlation function in the WiggleZ spectroscopic galaxy survey, at three different epochs. Using N-body simulations to predict the clustering of matter, we have constrained the linear and nonlinear bias parameters of WiggleZ galaxies with respect to total matter, and marginalized over them to obtain constraints on σs(z), the variance of perturbations, and its evolution with redshift. These measurements are consistent with the predictions of the ΛCDM concordance cosmology and test this model in a new way.