The Edinburgh/Durham Southern Galaxy Catalogue - I. First results on the galaxy angular correlation function

Abstract

We have used the Edinburgh/Durham Southern Galaxy Catalogue to calculate the angular two-point correlation function of galaxies at a depth of |$b_j\simeq 20$| for two regions of our survey. The correlation function for a region ∼ 100 deg2 calibrated to high accuracy confirms a break from a power-law corresponding to a physical scale ∼ 7h−1 Mpc. A partially calibrated region of ∼ 500 deg2 gives rise to a break feature on larger scales, indicating that systematic number density variations ⋍ 20 per cent may affect the position of the break. In the context of current theories of galaxy formation, models involving a standard cold dark matter power spectrum with additional large-scale power appear to be excluded.