Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-02-26
Mon.Not.Roy.Astron.Soc. 325 (2001) 321
Astronomy and Astrophysics
Astrophysics
14 pages, 11 figures, MNRAS, in press
Scientific paper
10.1046/j.1365-8711.2001.04430.x
We explore the implications for the high redshift universe of ``state-of-the-art'' models for the chemical and spectrophotometric evolution of spiral galaxies. The models are based on simple ``scaling relations'' for discs, obtained in the framework of Cold Dark Matter models for galaxy formation, and were ``calibrated'' as to reproduce the properties of the Milky Way and of nearby discs (at redshift z~0). In this paper, we compare the predictions of our ``hybrid'' approach to galaxy evolution to observations at moderate and high redshift. We find that the models are in fairly good agreement with observations up to z~1, while some problems appear at higher redshift (provided there is no selection bias in the data); these discrepancies may suggest that galaxy mergers (not considered in this work) played a non negligible role at z>1. We also predict the existence of a ``universal'' correlation between abundance gradients and disc scalelengths, independent of redshift.
Boissier Samuel
Prantzos Nikos
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