The large-scale clustering of radio galaxies

Astronomy and Astrophysics – Astronomy

Scientific paper

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Density Distribution, Galactic Clusters, Power Spectra, Radio Galaxies, Universe, Correlation, Cosmology, Red Shift, Spectrum Analysis, Wavelengths

Scientific paper

An all-sky sample of radio galaxies at redshifts equal to or less than 0.1 is used to study clustering in the universe on scales up to several hundred Mpc. The two-point correlation function for these galaxies is consistent with their high optical luminosity and location in moderately rich environment. Direct methods for obtaining the power spectrum of the density field traced by the radio galaxies are discussed taking into account the selection function of the sample. The results of the power-spectrum analysis indicate that the distribution of radio galaxies is more uniform on very large scales than would be predicted from an extrapolation of the power-law clustering found on small scales.

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