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

Kazuhiro Yamamoto; Takahiro Sato; Gert Hütsi

doi:10.1143/PTP.120.609

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

Kazuhiro Yamamoto, Takahiro Sato, Gert Hütsi

Research output: Contribution to journal › Article › peer-review

52 Citations (Scopus)

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.

Original language	English
Pages (from-to)	609-614
Number of pages	6
Journal	Progress of Theoretical Physics
Volume	120
Issue number	3
DOIs	https://doi.org/10.1143/PTP.120.609
Publication status	Published - Sep 1 2008
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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AB - 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.

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

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