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Astron. Astrophys. 364, 349-368 (2000)

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Evolution of faint galaxy clustering

The 2-point angular correlation function of 20,000 galaxies to V [FORMULA] 23.5 and I [FORMULA] 22.5 *

R.A. Cabanac **  1, V. de Lapparent 1 and P. Hickson 2

1 Institut d'Astrophysique de Paris, CNRS, 98 bis bvd Arago, 75014 Paris, France
2 Department of Physics and Astronomy, UBC, 2219 Main Mall, Vancouver, BC V6T1Z4, Canada

Received 6 March 2000 / Accepted 27 June 2000


The UH8K wide field camera of the CFHT was used to image 0.68 deg2 of sky. From these images, [FORMULA]20,000 galaxies were detected to completeness magnitudes [FORMULA] and [FORMULA]. The angular correlation function of these galaxies is well represented by the parameterization [FORMULA]. The slope [FORMULA] shows no significant variation over the range of magnitude. The amplitude [FORMULA] decreases with increasing magnitude in a way that is most compatible with a [FORMULA]CDM model ([FORMULA]) with a hierarchical clustering evolution parameter [FORMULA]. We infer a best-fit spatial correlation length of [FORMULA] Mpc at [FORMULA]. The peak redshift of the survey ([FORMULA]) is estimated to be [FORMULA], using the blue-evolving luminosity function from the CFRS and the flat [FORMULA] cosmology, and [FORMULA] Mpc. We also detect a significant difference in clustering amplitude for the red and blue galaxies, quantitatively measured by correlation lengths of [FORMULA] Mpc and [FORMULA] Mpc respectively, at [FORMULA].

Key words: cosmology: large-scale structure of Universe – galaxies: evolution

* Based on observations from the Canada-France-Hawaii Telescope, operated by the National Research Council of Canada, the Centre National de la Recherche Scientifique de France and the University of Hawaii
** Fellow of Fonds FCAR, Québec

Send offprint requests to: R.A. Cabanac (cabanac@iap.fr)

© European Southern Observatory (ESO) 2000

Online publication: January 29, 2001