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We calculate the spatial two-point auto and cross-correlation functions forthe 765 galaxies with Rc<21.5 and 0.1<z<0.51 in the ESO-Sculptor survey, andexplore the segregation effects among the populations of giant (early-type,late spiral) and dwarf (dE, dI) galaxies. At separation of 0.3 h^-1 Mpc, pairsof early-type galaxies dominate the clustering over all the other types ofpairs. At intermediate scales, 0.3-5 h^-1 Mpc, mixed pairs of dwarf and giantgalaxies contribute equally as pairs of giant galaxies, whereas the latterdominate at ~10 h^-1 Mpc. We detect the signature of the transition between the1-halo and 2-halo regimes which is expected in the scenario of galaxy formationby hierarchical merging of dark matter halos. The early-type galaxies largelyoutdo the late spiral galaxies in their 1-halo component, whereas the 2-halocomponents of both giant populations are comparable. The dwarf galaxies have anintermediate 1-halo component between the 2 giant galaxy types, and their2-halo component is weak and consistent with null clustering. The presentanalysis indicates that the early-type galaxies are preferentially located nearthe centers of the most massive halos, whereas late spiral galaxies tend tooccupy their outskirts or the centers of less massive halos. This analysis alsounveils new results on the spatial distribution of dwarf galaxies: at the scaleat which they significantly cluster inside the halos (<0.3 h^-1 Mpc), they arepoorly mixed with the late spiral galaxies, and appear preferentially assatellites of early-type galaxies.

Spatial clustering in the ESO-Sculptor Survey: two-point correlation functions by galaxy type at redshifts 0.1 - 0.5