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The evolution of the mass-metallicity relation up to z≈0.9 from the VIMOS/VLT Deep Survey

Published online by Cambridge University Press:  01 August 2006

F. Lamareille ,
T. Contini ,
S. Charlot  and
J. Brinchmann
F. Lamareille
Affiliation:
Laboratoire d'Astrophysique de Toulouse/Tabres (UMR5572), CNRS, Université Paul Sabatier – Toulouse III, Observatoire Midi-Pyrénées, 14 av. E. Belin, 31400 Toulouse, France Max-Planck Institut für Astrophysik, 85741 Garching, Germany
T. Contini
Affiliation:
Laboratoire d'Astrophysique de Toulouse/Tabres (UMR5572), CNRS, Université Paul Sabatier – Toulouse III, Observatoire Midi-Pyrénées, 14 av. E. Belin, 31400 Toulouse, France
S. Charlot
Affiliation:
Max-Planck Institut für Astrophysik, 85741 Garching, Germany Institut d'Astrophysique de Paris (UMR7095), CNRS, 98bis Bd. Arago, 75014 Paris, France
J. Brinchmann
Affiliation:
Max-Planck Institut für Astrophysik, 85741 Garching, Germany CAUP, Rua das Estrelas S/N, 4150-752 Porto, Portugal.
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Abstract

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We present the first results derived from the spectrophotometric properties of the Vimos VLT Deep Survey (VVDS) first epoch data. We have measured the spectral features (emission/absorption lines, 4000Å break) of a sample a ≈8000 galaxies taken from the VVDS deep 02h and CDFS fields using the platefit VVDS pipeline. We first selected a sub-sample of star-forming galaxies, which were distinguished from narrow-line AGNs by standard and blue diagnostic diagrams. Then the gas-phase oxygen abundances have been derived by fitting all available emission lines towards photo-ionization models. Finally the masses have been derived by fitting all photometric points together with significant spectral features to a library of stellar population models with complex star formation histories. The mass-metallicity relation that we find at low redshifts is in good agreement with previsous studies performed in the local Universe. We find moreover a significant evolution of the mass-metallicity relation with the redshift, the galaxies having on average less metals at a given mass when the redshift increases. We also find a flattening of the mass-metallicity relation up to z ~ 1.

Keywords

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Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S235: Galaxy Evolution Across the Hubble Time , August 2006 , pp. 408 - 411
Copyright
Copyright © International Astronomical Union 2007

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