Evidence for environment-dependent galaxy Luminosity Function up to z=1.5 in the VIMOS-VLT Deep Survey

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dc.creatorIlbert, O.
dc.creatorCucciati, O.
dc.creatorMarinoni, C.
dc.creatorTresse, L.
dc.creatorFevre, O. Le
dc.creatorZamorani, G.
dc.creatorBardelli, S.
dc.creatorIovino, A.
dc.creatorZucca, E.
dc.creatorArnouts, S.
dc.creatorBottini, D.
dc.creatorGarilli, B.
dc.creatorBrun, V. Le
dc.creatorMaccagni, D.
dc.creatorPicat, J. P.
dc.creatorScaramella, R.
dc.creatorScodeggio, M.
dc.creatorVettolani, G.
dc.creatorZanichelli, A.
dc.creatorAdami, C.
dc.creatorBolzonella, M.
dc.creatorCappi, A.
dc.creatorCharlot, S.
dc.creatorCiliegi, P.
dc.creatorContini, T.
dc.creatorFoucaud, S.
dc.creatorFranzetti, P.
dc.creatorGavignaud, I.
dc.creatorGuzzo, L.
dc.creatorMarano, B.
dc.creatorMazure, A.
dc.creatorMcCracken, H. J.
dc.creatorMeneux, B.
dc.creatorMerighi, R.
dc.creatorPaltani, S.
dc.creatorPello, R.
dc.creatorPollo, A.
dc.creatorPozzetti, L.
dc.creatorRadovich, M.
dc.creatorBondi, M.
dc.creatorBongiorno, A.
dc.creatorBusarello, G.
dc.creatorDe La Torre, S.
dc.creatorGregorini, L.
dc.creatorLamareille, F.
dc.creatorMathez, G.
dc.creatorMellier, Y.
dc.creatorMerluzzi, P.
dc.creatorRipepi, V.
dc.creatorRizzo, D.
dc.creatorVergani, D.
dc.date2006-02-15
dc.date.accessioned2026-07-07T07:00:45Z
dc.date.available2026-07-07T07:00:45Z
dc.descriptionWe measure the evolution of the galaxy Luminosity Function as a function of large-scale environment up to z=1.5 from the VIMOS-VLT Deep Survey (VVDS) first epoch data. The 3D galaxy density field is reconstructed using a sample of 6582 galaxies with 17.5 < I_{AB} < 24 and measured spectroscopic redshifts. We split the sample in four redshift bins up to z=1.5 and in under-dense and over-dense environments according to the average density contrast δ=0. There is a strong dependence of the Luminosity Function (LF) with large-scale environment up to z=1.2: the LF shape is observed to have a steeper slope in under-dense environments. We find a continuous brightening of ΔM* ~0.6 mag from z=0.25 to z=1.5 both in under-dense and over-dense environments. The rest-frame B-band luminosity density continuously increases in under-dense environments from z=0.25 to z=1.5 whereas its evolution in over-dense environments presents a peak at z~0.9. We interpret the peak by a complex interplay between the decrease of the star formation rate and the increasing fraction of galaxies at δ>0 due to hierarchical growth of structures. As the environmental dependency of the LF shape is already present at least up to z=1.2, we therefore conclude that either the shape of the LF is imprinted very early on in the life of the Universe, a `nature' process, or that `nurture' physical processes shaping up environment relation have already been efficient earlier than a look-back time corresponding to 30% of the current age of the Universe.
dc.description7 pages, 3 figures, submitted to A&A
dc.identifierhttps://arxiv.org/abs/astro-ph/0602329
dc.identifierhttp://arxiv.org/abs/astro-ph/0602329
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/108074
dc.subjectAstrophysics
dc.titleEvidence for environment-dependent galaxy Luminosity Function up to z=1.5 in the VIMOS-VLT Deep Survey
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