THE CANADA-FRANCE REDSHIFT SURVEY .8. EVOLUTION OF THE CLUSTERING OF GALAXIES FROM Z-SIMILAR-TO-1

This paper analyzes the spatial clustering of galaxies in the Canada-F rance Redshift Survey (CFRS). We have used the projected two-point cor relation function, w(r(p)), to investigate the spatial distribution of the 591 galaxies with secure redshifts between 0 less than or equal t o z less than or equal to 1.3 in the five CFRS fields. The slope of th e two-point correlation function for the sample as a whole is gamma = 1.64 +/- 0.05, very similar to the local slope, and gamma is therefore not strongly evolving with redshift. However, the amplitude of the co rrelation function decreases strongly with increasing redshift, so tha t at z approximate to 0.6 it is a factor of 10 lower (for q(0) = 0.5) than for a similarly selected local galaxy population, on scales 0.1 < r < 2 h(-1) Mpc (q(0) = 0.5). As a whole, the CFRS data are adequatel y represented by r(0)(z = 0.53) = 1.33 +/- 0.09 h(-1) Mpc for q(0) = 0 .5, and r(0)(z = 0.53) = 1.57 +/- 0.09 h(-1) Mpc for q(0) = 0. Unless the galaxy population at high redshift is quite different from any pop ulation seen locally, an unlikely possibility, then this implies growt h of clustering as described by the evolutionary parameter epsilon to be in the range 0 < epsilon < +2. No difference in the clustering of r ed and blue galaxies is seen at z greater than or equal to 0.5, althou gh at lower redshifts, 0.2 less than or equal to z less than or equal to 0.5, blue galaxies are somewhat less strongly correlated than the r edder galaxies, as seen in local samples. This effect could be the equ ivalent for field galaxies to the Butcher-Oemler effect seen in cluste rs of galaxies. The cross-correlation functions between red and blue s amples have comparable amplitudes to the autocorrelation functions of each. The distribution and power spectrum of pair separations does not indicate significant periodic patterns in the distribution of galaxie s along the lines of sight. Finally, the densest structures in the sur vey are identified and characterized, including the structure at z = 0 .985 in the 1415+52 field, reported previously, and a new cluster of g alaxies at z = 0.78 in the 1000+25 field.