Chemically Consistent Evolution of Galaxies on Cosmological Timescales and the DLA Galaxy Population
Abstract
We describe the evolution of galaxies in a chemically consistent way accounting for the increasing initial metallicity of successive generations of stars. The enrichment of various types of model galaxies is compared with Damped Lyα (= DLA) abundances over the redshift range from z 0 through z > 4.4. We discuss properties and composition of the galaxy population giving rise to DLA absorption. Beyond evolution of individual galaxies a change is found in the composition of DLA galaxy samples from high to low redshift. Spectrophotometric properties are predicted for optical identifications of DLA galaxies.
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