We investigate the evolution of the galaxy luminosity function from the VIMOS-VLT Deep Survey (VVDS) from the present to z = 2 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 17.5 <= I-AB <= 24.0, 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 z = 0.05 to z = 2, we measure a brightening of the characteristic magnitude M* included in the magnitude range 1.8-2.5, 1.7-2.4, 1.2-1.9, 1.1-1.8 and 1.0-1.6 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 ( M = M*( z = 0.1)). This density increases by a factor of around 2.6, 2.2, 1.8, 1.5, 1.5 between z = 0.05 and z = 1 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 Delta a similar to -0.3 between z = 0.05 and z = 1, similar in all bands.
The VIMOS-VLT Deep Survey - Evolution of the galaxy luminosity function up to z=2 in first epoch data / O. Ilbert, L. Tresse, E. Zucca, S. Bardelli, S. Arnouts, G. Zamorani, L. Pozzetti, D. Bottini, B. Garilli, V. Le Brun, O. Le Fèvre, D. Maccagni, J.-. Picat, R. Scaramella, M. Scodeggio, G. Vettolani, A. Zanichelli, C. Adami, M. Arnaboldi, M. Bolzonella, A. Cappi, S. Charlot, T. Contini, S. Foucaud, P. Franzetti, I. Gavignaud, L. Guzzo, A. Iovino, H.J. Mccracken, B. Marano, C. Marinoni, G. Mathez, A. Mazure, B. Meneux, R. Merighi, S. Paltani, R. Pello, A. Pollo, M. Radovich, M. Bondi, A. Bongiorno, G. Busarello, P. Ciliegi, F. Lamareille, Y. Mellier, P. Merluzzi, V. Ripepi, D. Rizzo. - In: ASTRONOMY & ASTROPHYSICS. - ISSN 0004-6361. - 439:3(2005), pp. 863-876. [10.1051/0004-6361:20041961]
The VIMOS-VLT Deep Survey - Evolution of the galaxy luminosity function up to z=2 in first epoch data
L. Guzzo;D. Rizzo
2005
Abstract
We investigate the evolution of the galaxy luminosity function from the VIMOS-VLT Deep Survey (VVDS) from the present to z = 2 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 17.5 <= I-AB <= 24.0, 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 z = 0.05 to z = 2, we measure a brightening of the characteristic magnitude M* included in the magnitude range 1.8-2.5, 1.7-2.4, 1.2-1.9, 1.1-1.8 and 1.0-1.6 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 ( M = M*( z = 0.1)). This density increases by a factor of around 2.6, 2.2, 1.8, 1.5, 1.5 between z = 0.05 and z = 1 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 Delta a similar to -0.3 between z = 0.05 and z = 1, similar in all bands.
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