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 ≤ IAB ≤ 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 Deltaalpha ~ -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 / Ilbert O.; Tresse L.; Zucca E.; Bardelli S.; Arnouts S.; Zamorani G.; Pozzetti L.; Bottini D.; Garilli B.; Le Brun V.; Le Fèvre O.; Maccagni D.; Picat J.-P.; Scaramella R.; Scodeggio M.; Vettolani G.; Zanichelli A.; Adami C.; Arnaboldi M.; Bolzonella M.; Cappi A.; Charlot S.; Contini T.; Foucaud S.; Franzetti P.; Gavignaud I.; Guzzo L.; Iovino A.; McCracken H. J.; Marano B.; Marinoni C.; Mathez G.; Mazure A.; Meneux B.; Merighi R.; Paltani S.; Pello R.; Pollo A.; Radovich M.; Bondi M.; Bongiorno A.; Busarello G.; Ciliegi P.; Lamareille F.; Mellier Y.; Merluzzi P.; Ripepi V.; Rizzo D. Astronomy and Astrophysics Volume 439 Issue 3 September I 2005 pp.863-876. - In: ASTRONOMY & ASTROPHYSICS. - ISSN 0004-6361. - STAMPA. - 439:(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
MARANO, BRUNO;BONGIORNO, ANGELA;
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 ≤ IAB ≤ 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 Deltaalpha ~ -0.3 between z=0.05 and z=1, similar in all bands.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
