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The build-up of the colour-magnitude relation in galaxy clusters since z∼ 0.8

De Lucia, Gabriella ; Poggianti, Bianca M. ; Aragón-Salamanca, Alfonso ; White, Simon D. M. ; Zaritsky, Dennis ; Clowe, Douglas ; Halliday, Claire ; Jablonka, Pascale ; Von Der Linden, Anja ; Milvang-Jensen, Bo ; Pelló, Roser ; Rudnick, Gregory ; Saglia, Roberto P. ; Simard, Luc

In: Monthly Notices of the Royal Astronomical Society, 2007, vol. 374, no. 3, p. 809-822

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    Titre
    • The build-up of the colour-magnitude relation in galaxy clusters since z∼ 0.8
    Auteur
    • De Lucia, Gabriella. Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, D-85748 Garching, Germany
    • Poggianti, Bianca M.. INAF - Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, Padova I-35122, Italy
    • Aragón-Salamanca, Alfonso. School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD
    • White, Simon D. M.. Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, D-85748 Garching, Germany
    • Zaritsky, Dennis. Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USA
    • Clowe, Douglas. Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USA
    • Halliday, Claire. INAF,Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Firenze, Italy
    • Jablonka, Pascale. Observatoire de Genève, Laboratoire d'Astrophysique Ecole Polytechnique Federale de Lausanne (EPFL), CH-1290 Sauverny, Switzerland
    • Von Der Linden, Anja. Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, D-85748 Garching, Germany
    • Milvang-Jensen, Bo. Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, DK-2100 Copenhagen, Denmark
    • Pelló, Roser. Laboratoire d'Astrophysique, UMR 5572, Observatoire Midi-Pyrenees, 14 Avenue Edouard Belin, Toulouse F-31400, France
    • Rudnick, Gregory. NOAO, 950 N. Cherry Avenue, Tucson, AZ 85719, USA
    • Saglia, Roberto P.. Max-Planck-Institut für extraterrestrische Physik, Giessenbachstrasse Postfach 1312, Garching D-85748, Germany
    • Simard, Luc. Herzberg Institute of Astrophysics, National Research Council of Canada, 5071 West Saanich Road, Victoria, Canada BC V9E 2E7
    Type de document
    • Postprint
    Langue
    • Inglese
    Publié dans
    • Monthly Notices of the Royal Astronomical Society, 2007, vol. 374, no. 3, p. 809-822. Blackwell Publishing Ltd
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:299211
    Summary
    Using galaxy clusters from the ESO Distant Cluster Survey, we study how the distribution of galaxies along the colour-magnitude relation has evolved since z∼ 0.8. While red-sequence galaxies in all these clusters are well described by an old, passively evolving population, we confirm our previous finding of a significant evolution in their luminosity distribution as a function of redshift. When compared to galaxy clusters in the local Universe, the high-redshift EDisCS clusters exhibit a significant deficit of faint red galaxies. Combining clusters in three different redshift bins, and defining as ‘faint' all galaxies in the range 0.4 ≳L/L*≳ 0.1, we find a clear decrease in the luminous-to-faint ratio of red galaxies from z∼ 0.8 to ∼0.4. The amount of such a decrease appears to be in qualitative agreement with predictions of a model where the blue bright galaxies that populate the colour-magnitude diagram of high-redshift clusters, have their star formation suppressed by the hostile cluster environment. Although model results need to be interpreted with caution, our findings clearly indicate that the red-sequence population of high-redshift clusters does not contain all progenitors of nearby red-sequence cluster galaxies. A significant fraction of these must have moved on to the red sequence below z∼ 0.8