| Issue |
A&A
Volume 387, Number 2, May IV 2002
|
|
|---|---|---|
| Page(s) | 396 - 405 | |
| Section | Astrophysical processes | |
| DOI | https://doi.org/10.1051/0004-6361:20020303 | |
| Published online | 13 May 2002 | |
Numerical simulations of the cosmic star formation history
1
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, yago.ascasibar@uam.es
Received:
12
November
2001
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
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