Computer Science
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1111..235c&link_type=abstract
PROBING STELLAR POPULATIONS OUT TO THE DISTANT UNIVERSE: CEFALU 2008, Proceedings of the International Conference. AIP Conferen
Computer Science
Star Formation, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies, Origin, Formation, Evolution, Age, And Star Formation
Scientific paper
We present initial results of an ESO-VLT large programme (AMAZE) aimed at determining the evolution of the mass-metallicity relation at z>3 by means of deep near-IR spectroscopy. Gas metallicities and stellar masses are accurately measured for an initial sample of 9 star forming galaxies at z~3.5. When compared with previous surveys, the mass-metallicity relation shows an evolution much stronger than at lower redshifts; there are also indications for a chemical version of the galaxy downsizing. The comparison between the observed mass-metallicity relation and the predictions of some hierarchical evolutionary models suggests that at z>3 galaxies are assembled mostly with relatively un-evolved sub-units.
Cocchia Filomena
Maiolino Roberto
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