The Vimos-VLT Deep Survey is a spectroscopic survey aiming at collecting more than 50000 spectra down to a limiting magnitude IAB=24, and 100000 down to IAB=22.5, on a total of about 16 deg2 without any color or morphology preselection. We present the N(z) distribution up to z~ 5, obtained from a purely magnitude-limited sample down to IAB=24, which is an important input to weak-lensing studies. We discuss the evolution of the galaxy luminosity function up to z~ 2, which exhibits a very strong increase in the typical galaxy luminosity Delta M*≃ -2.5 in the U band compared to the local value. Surveys like the VVDS also allow to study the galaxy bias as a function of redshift without assumption about its linearity, an assumption that we find to be violated in some cases. A low bias is found, and the linear bias is shown to increase with redshift.
The Vimos-VLT Deep Survey: Results from the First-Epoch Observations / Paltani S.; Ilbert O.; Le Fèvre O.; Marinoni C.; Bottini D.; Garilli B.; Le Brun V.; Maccagni D.; Picat J.-P.; Scaramella R.; Scodeggio M.; Tresse L.; Vettolani G.; Zanichelli A.; Adami C.; Arnaboldi M.; Arnouts S.; Bardelli S.; Bolzonella M.; Cappi A.; Charlot S.; Contini T.; Foucaud S.; Franzetti P.; Gavignaud I.; Guzzo L.; Iovino A.; McCracken H. J.; Marano B.; Mazure A.; Meneux B.; Merighi R.; Pellò R.; Pollo A.; Pozzetti L.; Radovich M.; Zamorani G.; Zucca E.; Bondi M.; Bongiorno A.; Busarello G.; Ciliegi P.; Gregorini L.; Mathez G.; Mellier Y.; Merluzzi P.; Ripepi V.; Rizzo D. - STAMPA. - 225:(2005), pp. 395-400. (Intervento presentato al convegno Gravitational Lensing Impact on Cosmology, IAU Symposium, vol. 225. . Cambridge, UK: p.395-400 tenutosi a Cambridge, UK nel 2005).
The Vimos-VLT Deep Survey: Results from the First-Epoch Observations
MARANO, BRUNO;BONGIORNO, ANGELA;GREGORINI, LORETTA;
2005
Abstract
The Vimos-VLT Deep Survey is a spectroscopic survey aiming at collecting more than 50000 spectra down to a limiting magnitude IAB=24, and 100000 down to IAB=22.5, on a total of about 16 deg2 without any color or morphology preselection. We present the N(z) distribution up to z~ 5, obtained from a purely magnitude-limited sample down to IAB=24, which is an important input to weak-lensing studies. We discuss the evolution of the galaxy luminosity function up to z~ 2, which exhibits a very strong increase in the typical galaxy luminosity Delta M*≃ -2.5 in the U band compared to the local value. Surveys like the VVDS also allow to study the galaxy bias as a function of redshift without assumption about its linearity, an assumption that we find to be violated in some cases. A low bias is found, and the linear bias is shown to increase with redshift.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.