Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-08-20
Astronomy and Astrophysics
Astrophysics
To appear in "The Galaxy Disk in Cosmological Context"; Proceedings of IAU254; 9-13 June 2008; Copenhagen; v2: typo corrected;
Scientific paper
We study the effects of Supernova (SN) feedback on the formation of galaxies using hydrodynamical simulations in a Lambda-CDM cosmology. We use an extended version of the code GADGET-2 which includes chemical enrichment and energy feedback by Type II and Type Ia SN, metal-dependent cooling and a multiphase model for the gas component. We focus on the effects of SN feedback on the star formation process, galaxy morphology, evolution of the specific angular momentum and chemical properties. We find that SN feedback plays a fundamental role in galaxy evolution, producing a self-regulated cycle for star formation, preventing the early consumption of gas and allowing disks to form at late times. The SN feedback model is able to reproduce the expected dependence on virial mass, with less massive systems being more strongly affected.
Scannapieco Cecilia
Springel Volker
Tissera Patricia Beatriz
White Simon D. M.
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