SPH simulations of the chemical evolution of bulges
Abstract
We have implemented a chemical evolution model on the parallel AP3M+SPH DEVA code which we use to perform high resolution simulations of spiral galaxy formation. It includes feedback by SNII and SNIa using the Qij matrix formalism. We also include a diffusion mechanism that spreads newly introduced metals. The gas cooling rate depends on its specific composition. We study the stellar populations of the resulting bulges finding a potential scenario where they seem to be composed of two populations: an old, metal poor, α-enriched population, formed in a multiclump scenario at the beginning of the simulation and a younger one, formed by slow accretion of satellites or gas, possibly from the disk due to instabilities.
- Publication:
-
Formation and Evolution of Galaxy Bulges
- Pub Date:
- July 2008
- DOI:
- 10.1017/S1743921308017225
- arXiv:
- arXiv:0709.0818
- Bibcode:
- 2008IAUS..245...35M
- Keywords:
-
- galaxies: abundances;
- galaxies: formation;
- galaxies: bulges;
- methods: n-body simulations;
- Astrophysics
- E-Print:
- 2 pages, 3 figures. Proceedings of IAUS 245 "Formation and Evolution of Galaxy Bulges"