GALEV evolutionary synthesis models describe the spectral and chemical evolution of galaxies over cosmological timescales, i.e. from the onset of star formation (SF) to the present, in terms of time and redshift evolution for any cosmological model, including evolutionary and cosmological corrections, as well as attenuation by intergalactic hydrogen. With the stellar initial mass function (IMF) and the SFH of a model galaxy as the basic free parameters, GALEV follows the time and redshift evolution of its spectrum, luminosities and colours (currently UV - optical - NIR), gas content, stellar mass, gaseous and stellar abundances, SN rate, etc. The number of free parameters is kept to a minimum. GALEV doesn't yet incorporate the effects of galaxy dynamics, nor does it provide spatially resolved information.
A cosmological model can be included to yield the redshift evolution of both gas phase abundances in terms of a large number of individual elements and of spectral properties including evolutionary and cosmological corrections as well as the effect of attenuation on the light from distant galaxies by intervening neutral hydrogen.
GALEV models can also include the effects of starbursts as well as of star formation truncation in galaxies, and, for the first time, follow their full evolution through post-starburst and post-star-formation phases.
Applications of GALEV models cover the range from local resolved stellar populations like star clusters and dwarf galaxies to analyses of observations of star clusters in integrated light in starburst galaxies to studies of the chemical and spectral properties of nearby galaxies of all kinds (including normal, dwarf, starbursting, and interacting ones, in the isolation, groups and clusters) all through studies of high-redshift galaxies.
Dust absorption is not yet included in the present set of GALEV models. Our first attempt to consistently include dust into the chemically consistent models for various types of galaxies accounting for the evolution in gas content and abundances and for geometry and projection effects (averaged over samples) gave promising results (Möller et al. 2001a,b). The effects of dust absorption and thermal reemission (stellar envelopes, PAH features, diffuse component) are currently being included in collaboration with C. Popescu (UCLan) and R. Tuffs (MPIK, Heidelberg) to extend the spectral range of the GALEV models into the mid- and far-IR.
A long-term project will couple GALEV with a cosmodynamical structure formation code including stars, gas, and Dark Matter, a SF criterium and appropriate feedback description. An early feasibility study for this is in Contardo et al. 1998.