Large-Scale Anisotropic Correlation Function of SDSS Luminous Red Galaxies

Citation:

Okumura T, Matsubara T, Eisenstein DJ, Kayo I, Hikage C, Szalay AS, Schneider DP. Large-Scale Anisotropic Correlation Function of SDSS Luminous Red Galaxies. The Astrophysical Journal. 2008;676 :889-898.

Date Published:

April 1, 2008

Abstract:

We study the large-scale anisotropic two-point correlation functionusing 46,760 luminous red galaxies at redshifts 0.16-0.47 from the SloanDigital Sky Survey. We measure the correlation function as a function ofseparations parallel and perpendicular to the line of sight in order totake account of anisotropy of the large-scale structure in redshiftspace. We find a slight signal of baryonic features in the anisotropiccorrelation function, i.e., a ``baryon ridge'' corresponding to a baryonacoustic peak in the spherically averaged correlation function, whichhas already been reported using the same sample. The baryon ridge hasprimarily a spherical structure with a known radius in comovingcoordinates. It enables us to divide the redshift distortion effectsinto dynamical and geometrical components and provides furtherconstraints on cosmological parameters, including the dark energyequation-of-state. With an assumption of a flat Λ cosmology, wefind the best-fit values ofΩm=0.218+0.047-0.037 and

Notes:

n/a

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