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Title: Cosmological tests using redshift space clustering in BOSS DR11

We analyze the clustering of large scale structure in the Universe in a model independent method, accounting for anisotropic effects along and transverse to the line of sight. A large sample of 690,000 galaxies from The Baryon Oscillation Spectroscopy Survey Data Release 11 are used to determine the Hubble expansion H, angular distance D{sub A}, and growth rate G{sub Θ} at an effective redshift of z=0.57. After careful bias and convergence studies of the effects from small scale clustering, we find that cutting transverse separations below 40 Mpc/h delivers robust results while smaller scale data leads to a bias due to unmodelled nonlinear and velocity effects. The converged results are in agreement with concordance ΛCDM cosmology, general relativity, and minimal neutrino mass, all within the 68% confidence level. We also present results separately for the northern and southern hemisphere sky, finding a slight tension in the growth rate --- potentially a signature of anisotropic stress, or just covariance with small scale velocities --- but within 68% CL.
Authors:
; ;  [1] ;  [2] ;  [3]
  1. Korea Astronomy and Space Science Institute, Daejeon, 305-348 (Korea, Republic of)
  2. Korea Institute for Advanced Study, Dongdaemun-gu, Seoul, 130-722 (Korea, Republic of)
  3. Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), The University of Tokyo, Chiba, 277-8582 Japan (Japan)
Publication Date:
OSTI Identifier:
22382096
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 12; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANISOTROPY; BARYONS; CONVERGENCE; COSMOLOGY; DISTANCE; EXPANSION; GALAXIES; GENERAL RELATIVITY THEORY; MASS; NEUTRINOS; NONLINEAR PROBLEMS; OSCILLATIONS; RED SHIFT; SOUTHERN HEMISPHERE; UNIVERSE