Testing general relativity with the multipole spectra of the SDSS luminous red galaxies

Details Testing general relativity with the multipole spectra of the SDSS luminous red galaxies Testing general relativity with the multipole spectra of the SDSS luminous red galaxies

2008-05-30

arxiv.org/abs/0805.4789v4

Prog.Theor.Phys.120:609-614,2008

Astronomy and Astrophysics

Astrophysics

important mistake in computation corrected

Scientific paper

10.1143/PTP.120.609

As a test of general relativity on cosmological scales, we measure the \gamma 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 \gamma=0.62+1.8(\sigma_8-0.8) \pm 0.11 at 1-sigma confidence level, which is consistent with the prediction of general relativity, \gamma\simeq0.55\sim0.56. Rather high value of \sigma_8(\geq0.87) is required to be consistent with the prediction of the cosmological DGP model, \gamma\simeq0.68.

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