| Type de publication : |
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Preprint, Working Paper, Document sans référence, etc. |
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| Domaine : |
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Physique/Astrophysique/Cosmologie et astrophysique extra-galactique
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| Titre : |
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The zCOSMOS survey: the role of the environment in the evolution of the luminosity function of different galaxy types |
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| Auteur(s) : |
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E. Zucca 1, S. Bardelli 2, M. Bolzonella 3, G. Zamorani 4, O. Ilbert 5, L. Pozzetti 2, M. Mignoli 4, K. Kovac 4, S. Lilly 4, L. Tresse 5, L. Tasca 5, P. Cassata 4, C. Halliday, D. Vergani 6, K. Caputi 4, C. M. Carollo 7, T. Contini 8, J. P. Kneib 8, O. LeFevre 5, V. Mainieri 4, A. Renzini 4, M. Scodeggio 9, A. Bongiorno 3, G. Coppa 4, O. Cucciati 10, S. delaTorre, L. deRavel, P. Franzetti 4, B. Garilli 4, A. Iovino 4, P. Kampczyk 4, C. Knobel 4, F. Lamareille 8, J. F. LeBorgne 8, V. Lebrun 5, C. Maier 4, R. Pello', Y. Peng 11, E. Perez-Montero 8, E. Ricciardelli 4, J. D. Silverman 4, M. Tanaka 12, U. Abbas 4, D. Bottini 4, A. Cappi 13, A. Cimatti 4, L. Guzzo 4, A. M. Koekemoer 14, A. Leauthaud 5, D. Maccagni 4, C. Marinoni 15, H. J. McCracken 16, P. Memeo 4, B. Meneux 5, M. Moresco, P. Oesch 4, C. Porciani 4, R. Scaramella 4, S. Arnouts 5, H. Aussel 4, P. Capak 17, J. Kartaltepe 4, M. Salvato 17, D. Sanders 18, N. Scoville 19, Y. Taniguchi 4, D. Thompson 20 |
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| Laboratoire : |
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Istituto Nazionale di Astrofisica - Osservatorio Astronomico di Brera (INAF) |
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Istituto Nazionale di Astrofisica |
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via Brera 28, Milan Italy |
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Italie |
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| 2 : |
INAF- Osservatorio Astronomico di Bologna (INAF) |
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INAF |
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via Ranzani 1, 40127 Bologna |
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Italie |
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| 3 : |
Università di Bologna, Dipartimento di Astronomia |
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Università degli studi di Bologna |
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via Ranzani 1, 40127 Bologna |
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Italie |
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| 4 : |
Autres |
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AUTRE |
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France |
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Laboratoire d'Astrophysique de Marseille (LAM) |
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http://www.oamp.fr/infoglueDeliverLive/www/LAM |
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CNRS : UMR6110 – INSU – Université de Provence - Aix-Marseille I |
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Pôle de l'Étoile Site de Château-Gombert 38, rue Frédéric Joliot-Curie 13388 Marseille cedex 13 |
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France |
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| 6 : |
INAF, Osservatorio Astrofisico di Arcetri, Largo |
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Osservatorio Astrofisico di ArcetI |
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INAF, Osservatorio Astrofisico di Arcetri, Largo Enrico Fermi 5, 50125 Florence, Italy), AV(IASF-INAF, via Bassini 15, 20133 Milano, Italy) |
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Italie |
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| 7 : |
The University of Chicago |
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Dept of the Geophysical Sciences |
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États-Unis |
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| 8 : |
Laboratoire Astrophysique de Toulouse-Tarbes (LATT) |
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http://webast.ast.obs-mip.fr |
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CNRS : UMR5572 – INSU – Observatoire Midi-Pyrénées – Université Paul Sabatier [UPS] - Toulouse III |
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14, avenue Edouard Belin 31400 Toulouse |
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France |
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| 9 : |
INAF- Milano |
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INAF |
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via Bassini 15 |
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Italie |
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| 10 : |
Dipartimento di Fisica |
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Università di Milano-Bicocca – Università degli studi di Milano |
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Piazza delle Scienze 3, 20126 Milano |
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Italie |
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| 11 : |
Laboratory for Climate Studies |
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Laboratory for Climate Studies |
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Chine |
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| 12 : |
Tokai University |
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Tokai University |
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Japon |
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| 13 : |
Istituto di Astrofisica Spaziale e Fisica cosmica - Bologna (IASF-Bo) |
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http:///www.iasfbo.inaf.it/web/ |
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INAF |
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Via gobetti 101 40129 Bologna |
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Italie |
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| 14 : |
Space Telescope Science Institute (STSI) |
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Space Telescope Science Institute |
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Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218. |
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États-Unis |
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| 15 : |
Centre de Physique Théorique (CPT) |
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http://www.cpt.univ-mrs.fr |
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CNRS : FR2291 – Université de Provence - Aix-Marseille I – Université de la Méditerranée - Aix-Marseille II – Université Sud Toulon Var |
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CNRS Luminy case 907 13288 Marseille cedex 9 |
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France |
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| 16 : |
Institut d'Astrophysique de Paris (IAP) |
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http://www.iap.fr/ |
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CNRS : UMR7095 – INSU – Université Pierre et Marie Curie [UPMC] - Paris VI |
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98bis, bd Arago - 75014 Paris France |
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France |
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| 17 : |
Max Planck Institut für Astronomie (MPIA) |
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http://www.mpia.de/Public/menu_q2.php |
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Max Planck Institut für Astronomie |
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Königstuhl 17, 69117 Heidelberg Tel.: (++49|0) 6221 – 528-0 Fax: (++49|0) 6221 – 528-246 E-mail: sekretariat@mpia.de |
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Allemagne |
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| 18 : |
Materials & Process technology |
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http://www.boeing.com/ |
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BOEING Company |
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P.O. Box 3707 MS5K-63 SEATTLE |
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États-Unis |
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| 19 : |
California Institute of Technology (Caltech) |
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http://www.caltech.edu |
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California Institute of Technology |
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France |
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| 20 : |
Sea Mammal Research Unit |
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St Andrews |
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Royaume-Uni |
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| Résumé : |
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(Abridged) We studied the evolution in the B band luminosity function to z~1 in the zCOSMOS 10k sample, for which both accurate galaxy classifications and a detailed description of the local density field are available. The global LF exhibits a brightening of ~0.7 mag in M* from z~0.2 to z~0.9. At low z, late types dominate at faint magnitudes, while the bright end is populated mainly by early types. At higher z, late-type galaxies evolve significantly and, at z~1, the contribution from the various types to the bright end of the LF is comparable. The evolution for early types is in both luminosity and normalization. A similar behaviour is exhibited by late types, but with an opposite trend for the normalization. Studying the role of the environment, we find that the global LF of galaxies in overdense regions has always a brighter M* and a flatter slope. In low density environments, the main contribution to the LF is from blue galaxies, while for high density environments there is an important contribution from red galaxies to the bright end. The differences between the global LF in the two environments are not due to only a difference in the relative numbers of red and blue galaxies, but also to their relative luminosity distributions: the value of M* for both types in underdense regions is always fainter than in overdense environments. The "specular" evolution of late- and early-type galaxies is consistent with a scenario where a part of blue galaxies is transformed in red galaxies with increasing cosmic time, without significant changes in the fraction of intermediate-type galaxies. The bulk of this tranformation in overdense regions probably happened before z~1, while it is still ongoing at lower z in underdense environments. |
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Langue du texte
intégral : |
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Anglais |
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Date de production,
écriture : |
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25/09/2009 |
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| Commentaire : |
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18 pages, 10 figures, A&A in press |
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