期刊
ASTRONOMY & ASTROPHYSICS
卷 387, 期 2, 页码 396-405出版社
E D P SCIENCES
DOI: 10.1051/0004-6361:20020303
关键词
galaxies : formation, stellar content; cosmology : observations, theory; stars : formation; methods : N-body simulations
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 Lambda-term and two high density models with different power spectra, all of them being spatially at. 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 z=1, and we discuss which facts may determine the decrease in the SFR from z=1 to the present epoch. The Lambda-term cosmology with realistic parameters for star formation and feedback best reproduces the observed star formation history.
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