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The 143 galaxies with secure redshifts (median z = 0.62) from the 1415+52field of the Canada-France Redshift Survey have been imaged at CFHT with medianseeing of 0.67 arcseconds. Structural parameters have been derived by fittingmulti-component models, and the results confirm two phenomena seen in a smallersample of galaxies imaged with HST. First, 11% of the galaxies lie off thenormal locus of colour vs. bulge fraction. This class of objects("blue-nucleated galaxies" or BNGs) was first identified using HST observations(Schade et al. 1995, Ap J, 451, L1), where it was shown that they areassociated with peculiar or asymmetric structures and mergers/interactions. Theobserved frequency of BNGs in this sample is 14% for 0.5 < z < 1.2 and 6% at0.2 < z < 0.5, but the true frequency is likely to be a factor ~2 higher aftercorrections are made for the effect of asymmetric/peculiar structures. Second,galaxy disks at 0.5 < z < 1.1 are found to have a mean rest-frame,inclination-corrected, central surface brightness of $\mu_{AB}(B)=19.8 \pm 0.1$mag arcsec$^{-2}$, about 1.6 mag brighter than the Freeman (1970) value. At lowredshift, the mean surface brightness is consistent with the Freeman value.These results are consistent with the HST observations. With larger numbers ofgalaxies and therefore more statistical weight, they demonstrate thecapabilities, and limits, of ground-based work in the study of galaxymorphology at high redshift.

Canada-France Redshift Survey. XI. Morphology of High-Redshift Field Galaxies from High-Resolution Ground-based Imaging