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Quasar correlation function and redshift space distortion from SDSS DR5 data

  • Structure and Dynamics of the Galaxy
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Abstract

For z = 0.8–2.2 redshift interval, quasar pair correlation function parameters and β redshift space distortion parameter (connected to large-scale potential flows) values are estimated. We base them on the Main QSO Sample from SDSS Data Release 5. Standard correlation function form ξ(r) = (r 0/r)γ is used for comoving distances r = 2–50 Mpc between quasars. We fix the parameters of the cosmological model: ΩΛ = 1 − Ω M = 0.726 and H 0 = 70.5 km/(s Mpc). We come to the best-fit parameter values of γ = 1.77 ± 0.20, r 0 = 5.52 ± 0.95 Mpc/h for r in the range 2–30 Mpc, γ = 1.91 ± 0.11, r 0 = 5.82 ± 0.61 Mpc for r in the range 2–50 Mpc. The mean β value is β = 0.43 ± 0.22.

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Authors and Affiliations

  1. Astronomical Observatory, Shevchenko Kiev National University, Kiev, Russia

    A. Yu. Ivashchenko & V. I. Zhdanov

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  1. A. Yu. Ivashchenko
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Original Russian Text © A.Yu. Ivashchenko, V.I. Zhdanov, 2010, published in Kinematika i Fizika Nebesnykh Tel, 2010, Vol. 26, No. 1, pp. 43–56.

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Ivashchenko, A.Y., Zhdanov, V.I. Quasar correlation function and redshift space distortion from SDSS DR5 data. Kinemat. Phys. Celest. Bodies 26, 18–25 (2010). https://doi.org/10.3103/S0884591310010022

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