The Chemical Evolution of Intermediate Mass Galaxies over the Last 8 Gyrs

Details The Chemical Evolution of Intermediate Mass Galaxies over the Last 8 Gyrs The Chemical Evolution of Intermediate Mass Galaxies over the Last 8 Gyrs

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..419..331r&link_type=abstract

Galaxy Evolution: Emerging Insights and Future Challenges ASP Conference Series, Vol. 419, proceedings of a conference held 11-1

Astronomy and Astrophysics

Astronomy

Scientific paper

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 ˜0.3 dex 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.

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