Numerical simulations of the cosmic star formation history
Grupo de Astrofísica, C-XI Universidad Autónoma de Madrid, 28049 Madrid, Spain
2 Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482, Germany
Corresponding author: Y. Ascasibar, email@example.com
Accepted: 27 February 2002
The cosmic star formation history in Cold Dark Matter dominated cosmological scenarios is studied by means of hydrodynamical numerical simulations. In particular, we explore a low density model with a Λ-term and two high density models with different power spectra, all of them being spatially flat. Our simulations employ a fully nonlinear N-body and Eulerian hydrodynamics algorithm with a model for star formation and supernovae feedback that depends on two phenomenological parameters determined in agreement with previous papers. We find a nearly constant star formation rate beyond , and we discuss which facts may determine the decrease in the SFR from to the present epoch. The Λ-term cosmology with realistic parameters for star formation and feedback best reproduces the observed star formation history.
Key words: galaxies: formation, stellar content / cosmology: observations, theory / stars: formation / methods: N-body simulations
© ESO, 2002