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Galaxy groups in the 2dF Galaxy Redshift Survey: the number density of groups

Monthly Notices of the Royal Astronomical Society, no. 3 (2006): 1147-1158

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galaxies: clusters: generalgalaxies: haloeslarge-scale structure of Universe

Abstract

The abundance of galaxy clusters as a function of mass is determined from the 2dF Galaxy Redshift Survey (2dFGRS) Percolation-Inferred Galaxy Group (2PIGG) catalogue. This is used to estimate the amplitude of the matter fluctuation spectrum, parametrized by the linear theory rms density fluctuations in spheres of radius 8h−1 Mpc, σ8. The ...More

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