Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics
Scientific paper
2009-03-24
Astronomy and Astrophysics
Astrophysics
Galaxy Astrophysics
Accepted for publication in MNRAS
Scientific paper
10.1111/j.1745-3933.2009.00664.x
We have obtained the mass-metallicity (M-Z) relation at different lookback times for the same set of galaxies from the Sloan Digital Sky Survey, using the stellar metallicities estimated with our spectral synthesis code STARLIGHT. We have found that this relation steepens and spans a wider range in both mass and metallicity at higher redshifts. We have modeled the time evolution of stellar metallicity with a closed-box chemical evolution model, for galaxies of different types and masses. Our results suggest that the M-Z relation for galaxies with present-day stellar masses down to 10^10 M_sun is mainly driven by the history of star formation history and not by inflows or outflows.
Cid Fernandes Roberto
Gomes Jean Michel
Mateus Abilio
Schlickmann Marielli
Schoenell William
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