Cosmological Redshift-Space Distortion II: distance in an inhomogeneous universe and evolution of bias

1996/07/22 by Yasushi Suto, Suto, Yasushi, Takahiko Matsubara +1
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #Cosmology and Gravitation Theories #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #astro-ph

paper · pdf · doi:10.48550/arxiv.astro-ph/9607102

5 pages, 4 figures included

arxiv created 1996/07/22 · openalex publication_date 1996/07/22 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We discuss the two potentially important effects which should be taken into account in the analysis of the cosmological redshift-space distortion especially at high redshifts; the effect of inhomogeneities in the light propagation and the evolution of bias. Although such inhomogeneities affect significantly the degree of the cosmological redshift distortion, one can determine the density parameter Ω₀ from the distortion pattern at z=0, and the cosmological constant λ₀ from that at z = (1∼ 2). In particular we show that in low-density (Ω₀≪ 1) universes one can determine the value of λ₀ and even the evolution of the bias parameter almost insensitively to the degree of the clumpiness of the matter distribution in the universe.

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