Testing General Relativity with the Multipole Spectra of the SDSS Luminous Red Galaxies
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Open Access
- 1 September 2008
- journal article
- Published by Oxford University Press (OUP) in Progress of Theoretical Physics
- Vol. 120 (3) , 609-614
Abstract
As a test of general relativity on cosmological scales, we measure the γ parameter for the growth rate of density perturbations using the redshift-space distortion of the luminous red galaxies in the Sloan Digital Sky Survey (SDSS). Assuming the cosmological constant model, which matches the results of the WMAP experiment, we find γ = 0.62 + 1.8(σ8 − 0.8) ± 0.11 at 1-sigma confidence level, which is consistent with the prediction of general relativity, γ ≃ 0.55 ∼ 0.56. Rather high value of σ8 (≥ 0.87) is required to be consistent with the prediction of the cosmological DGP model, γ ≃ 0.68.Keywords
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