The spatial correlation function of cD Abell clusters

We calculated the spatial two-point correlation function of cD clusters in Abell's statistical sample using estimated redshifts and found that positive correlation exists on all scales except around 70 Mpc and 170 Mpc (H₀ = 100 km s⁻¹ Mpc⁻¹). In particular, positive correlation persists on the super large scale around 300 Mpc. This is particularly interesting in view of the known relationships among cD clusters, radio sources and superclusters.