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Lookback time evolution of metals: discarding the closed box model

Published online by Cambridge University Press:  09 March 2010

M. Rodrigues ,
F. Hammer ,
H. Flores  and
M. Puech
M. Rodrigues
Affiliation:
GEPI, Observatoire de Paris, CNRS, Universite Paris Diderot, 5 Place Jules Janssen 92190 Meudon, France
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Abstract

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We have gathered a representative sample of 88 intermediate mass galaxies at z~0.6 and have provided robust estimates of their gas phase metallicity based on the strong line method R23. We have found that these galaxies have undergone a strong evolution of their metal content during the last 8 Gyrs. We confirmed the shift about ~0.3dex to lower abundance of the M-Z relation at z~0.6 found by Liang et al. 2006. This result shows that the evolution of the gas phase is still active down to z=0.4 and that the close box model is not a valid scenario for local spiral progenitors.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S265: Chemical Abundances in the Universe: Connecting First Stars to Planets , August 2009 , pp. 181 - 182
Copyright
Copyright © International Astronomical Union 2010

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