Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-11-17
Astrophys.Space Sci. 281 (2002) 383-387
Astronomy and Astrophysics
Astrophysics
4 pages, 3 figures, to be published in "The Evolution of Galaxies. II. Basic Building Blocks", ed. M. Sauvage et al., Kluwer
Scientific paper
10.1023/A:1019533500643
We have undertaken numerical simulations of galaxy interactions and mergers, coupling the dynamics with the star formation history and the chemical evolution. The self-gravity of stars and gas is taken into account through a tree-code algorithm, the gas hydrodynamics through SPH, and an empirical law such as a local Schmidt law is used to compute star formation. The gas and stellar metallicity is computed at each position, according to assumed yields, and the dust amount is monitored. At each step the spectra of galaxies are computed, according to simple radiative transfer and dust models. Initial conditions for these simulations will be taken from a large-scale cosmological frame-work. The aim is to build a statistically significant library of merger histories. The first results of the project will be discussed, in particular on predictions about galaxy surveys at high redshift.
Combes François
Melchior Anne-Laure
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