Cosmological Constraints from the Anisotropic Clustering Analysis using BOSS DR9

Abstract

Our observations of the Universe are fundamentally anisotropic, with data from galaxies separated transverse to the line of sight coming from the same epoch while that from galaxies separated parallel to the line of sight coming from different times. Moreover, galaxy velocities along the line of sight change their redshift, giving redshift space distortions. We perform a full two-dimensional anisotropy analysis of galaxy clustering data, fitting in a substantially model independent manner the angular diameter distance D_A, Hubble parameter H, and growth rate ddelta/dln a without assuming a dark energy model. The results demonstrate consistency with LCDM expansion and growth, hence also testing general relativity. We also point out the interpretation dependence of the effective redshift z_eff, and its cosmological impact for next generation surveys.

12 pages, 14 figures

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• Constructing perturbation theory kernels for large-scale structure in generalized cosmologies
• Cosmic Growth and Expansion Conjoined
• Cosmological constraints from the redshift dependence of the Alcock-Paczynski test: galaxy density gradient field
• Cosmological constraints from the redshift dependence of the Alcock-Paczynski test and volume effect: galaxy two-point correlation function
• Model-Independent Measurements of Cosmic Expansion and Growth at z=0.57 Using the Anisotropic Clustering of CMASS Galaxies From the Sloan Digital Sky Survey Data Release 9
• Cosmological Tests using Redshift Space Clustering in BOSS DR11
• Cosmological constraints from the redshift dependence of the volume effect using the galaxy 2-point correlation function across the line-of-sight
• Cosmological implications of different baryon acoustic oscillation data