Numerical simulations of the cosmic star formation history

被引：26

作者：

Ascasibar, Y

Yepes, G

Gottlöber, S

Müller, V

机构：

[1] Univ Autonoma Madrid, Grp Astrofis, E-28049 Madrid, Spain

[2] Astrophys Inst Potsdam, D-14482 Potsdam, Germany

来源：

ASTRONOMY & ASTROPHYSICS | 2002年 / 387卷 / 02期

关键词：

galaxies; formation; stellar content; cosmology; observations; theory; stars : formation; methods : N-body simulations;

D O I：

10.1051/0004-6361:20020303

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：396 / 405

页数：10

共 58 条

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