The two-point correlation function and morphological segregation in the Optical Redshift Survey

We study the clustering of galaxies in real and redshift space using the Optical Redshift Survey (ORS). We estimate the two point correlation function in redshift space, ¸(s), for several subsamples of ORS, spanning nearly a factor of 30 in volume. We detect significant variations in ¸(s) among the subsamples covering small volumes. For volumes ? ¸ (75h \Gamma1 Mpc) 3 , however, the ORS subsamples present very similar clustering patterns. Fits of the form ¸(s) = ( s s0 ) \Gammafl s give best-fit values in the range 1:5 fl s 1:7 and 6:5 s 0 8:8h \Gamma1 Mpc for several samples extending to redshifts of 8000 km s \Gamma1 . However, in several cases ¸(s) is not well described by a single power-law, rendering the best-fit values quite sensitive to the interval in s adopted. We find significant differences in clustering between the diameter-limited and magnitude-limited ORS samples within a radius of 4000 km s \Gamma1 centered on the Local Group; ¸(s) is larger for the ..