Volume 439, Number 3, September I 2005
|Page(s)||863 - 876|
|Section||Cosmology (including clusters of galaxies)|
|Published online||12 August 2005|
The VIMOS-VLT deep survey
Evolution of the galaxy luminosity function up to z = 2 in first epoch data
Laboratoire d'Astrophysique de Marseille (UMR 6110), CNRS-Université de Provence, BP 8, 13376 Marseille Cedex 12, France e-mail: Olivier.Ilbert@oamp.fr
2 INAF – Osservatorio Astronomico di Bologna, via Ranzani 1, 40127 Bologna, Italy
3 INAF-IASF, via Bassini 15, 20133 Milano, Italy
4 Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrénées (UMR 5572), CNRS-Université Paul Sabatier, 14 avenue E. Belin, 31400 Toulouse, France
5 INAF-IRA, via Gobetti 101, 40129 Bologna, Italy
6 INAF – Osservatorio Astronomico di Capodimonte, via Moiariello 16, 80131 Napoli, Italy
7 Università di Bologna, Dipartimento di Astronomia, via Ranzani 1, 40127 Bologna, Italy
8 Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, 85740 Garching bei München, Germany
9 Institut d'Astrophysique de Paris (UMR 7095), 98bis boulevard Arago, 75014 Paris, France
10 European Southern Observatory, Karl-Schwarzschild-Str. 2, 85748 Garching bei München, Germany
11 INAF – Osservatorio Astronomico di Brera, via Brera 28, 20121 Milano, Italy
12 Observatoire de Paris-LERMA, 61 avenue de l'Observatoire, 75014 Paris, France
Accepted: 31 January 2005
We investigate the evolution of the galaxy luminosity function from the VIMOS-VLT Deep Survey (VVDS) from the present to in five (U, B, V, R and I) rest-frame band-passes. We use the first epoch VVDS deep sample of 11 034 spectra selected at , on which we apply the Algorithm for Luminosity Function (ALF), described in this paper. We observe a substantial evolution with redshift of the global luminosity functions in all bands. From to , we measure a brightening of the characteristic magnitude M* included in the magnitude range , , , and in the U, B, V, R and I rest-frame bands, respectively. We confirm this differential evolution of the luminosity function with rest-frame wavelength from the measurement of the comoving density of bright galaxies (). This density increases by a factor of around between and in the U, B, V, R, I bands, respectively. We also measure a possible steepening of the faint-end slope of the luminosity functions, with between and , similar in all bands.
Key words: surveys / galaxies: evolution / galaxies: luminosity function / mass function / galaxies: statistics
© ESO, 2005
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