J/ApJ/464/79 J/ApJ/464/79 CFRS XI: High-redshift field galaxies morphology D Schade S J Lilly O Le Fevre F Hammer D Crampton Astrophys. J. 464 79 1996 1996ApJ...464...79S J/ApJ/455/60 : CFRS II: 0000-00 and 1000+25 fields (Le Fevre+ 1995) J/ApJ/455/75 : CFRS III: 1415+52 and 2215+00 fields (Lilly+ 1995) J/ApJ/455/88 : CFRS IV: 0300+00 field (Hammer+ 1995) Lilly S.J. et al., Paper I. =1995ApJ...455...50L Le Fevre O. et al.. Paper II. =1995ApJ...455...60L, Cat. <J/ApJ/455/60> Lilly S.J. et al., Paper III. =1995ApJ...455...75L, Cat. <J/ApJ/455/75> Hammer F. et al., Paper IV. =1995ApJ...455...88H, Cat. <J/ApJ/455/88> Crampton D. et al., Paper V. =1995ApJ...455...96C Lilly S. J. et al., Paper VI. =1995ApJ...455..108L Hammer F. et al., Paper VII. =1995MNRAS.276.1085H Le Fevre O. et al., Paper VIII. =1996ApJ...461..534L Schade D. et al., Paper IX. =1995ApJ...451L...1S Schade D. et al., Paper X. =1996MNRAS.278...95S Tresse L. et al., Paper XII. =1996MNRAS.281..847T Galaxies, photometry Morphology Redshifts galaxies: distances and redshifts galaxies: evolution galaxies: photometry The 143 galaxies with secure redshifts (Z_median_=0.62) from the 1415+52 field of the Canada-France Redshift Survey have been imaged with median seeing of 0.67" (FWHM). Structural parameters have been derived by fitting multicomponent models and the results confirm two phenomena seen in a smaller sample of galaxies imaged with the Hubble Space Telescope. First, 11+/-3% of the galaxies lie off the normal locus of color versus bulge fraction B/T. This class of objects ("blue nucleated galaxies," or BNGs) was identified using HST observations (Schade et al. 1995ApJ...451L...1S, hereafter CFRS IX), and it was shown that they are associated with peculiar/asymmetric structure and merger/interactions. The observed frequency of BNGs in this sample is 14+/-4% 0.5<z<1.2 and 6^+6^_-3_% at 0.2<z<0.5, but the true frequency is likely to be a factor ~2 higher after corrections are made for the effect of asymmetric/peculiar structures. 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+/-0.1mag/arcsec^2^, ~1.6mag brighter than the Freeman (1970ApJ...160..811F) value. At low redshift (0.2<z<0.5) the mean surface brightness [{mu}_AB_(B)=21.3+/-0.25] is consistent with the Freeman value. These results are consistent with the HST observations. With larger numbers of galaxies and therefore more statistical weight they demonstrate the capabilities, and limits, of ground-based work in the study of galaxy morphology at high redshift.

CFRS Canada-France Redshift Survey designation --- z Redshift --- Imag I_AB_ magnitude mag V-I (V-I)_AB_ colour index mag MBmag Absolute B_AB_ magnitude number=1 Absolute magnitudes assume H_0_=50km/s/Mpc, q_0_=0.5 mag U-V (U-V)_AB_ colour magnitude mag B/T Colour versus bulge fraction --- h Scale length kpc James Marcout, Patricia Bauer CDS 1997Mar27 UNKNOWN UNKNOWN Prepared via OCR at CDS. J_ApJ_464_79.xml