The correlation function of rich clusters of galaxies - A comparison of APM and Abell clusters

Astronomy and Astrophysics – Astronomy

Scientific paper

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Correlation, Correlation Coefficients, Cosmology, Galactic Clusters, Anisotropy, Red Shift, Spatial Distribution, Universe

Scientific paper

The data of Postman et al. (1986, 1992) are used to show that the clustering of Abell clusters is highly anisotropic in redshift space, providing clear evidence of artificial clustering. The two-point correlation function of Abell clusters is found to be consistent with the present results for rich APM clusters. The cluster correlation function has a higher amplitude on scales greater than or approximately equal to 10/h Mpc than expected in the standard cold dark matter model and has the same shape as the galaxy correlation function measured from the APM Galaxy Survey.

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