Evolution of the chemical properties of galactic systems in hierarchical universes

DE ROSSI, MARIA EMILIA; TISSERA, PATRICIA BEATRIZ; SCANNAPIECO, CECILIA

Cambridge, Reino Unido

Conferencia; Starbursts. From 30 Doradus to Lyman Break Galaxies; 2004

Institute of Astronomy, The University of Cambridge

The chemical evolution of galaxies is directly linked to the dynamical and astrophysical evolution of the systems. Hence, the chemical properties of the stars and the interstellar medium could be used as fossil records of the history of galaxy formation. The treatment of metal enrichment in cosmological simulations opens up the possibility of consistently studying the formation of galaxies and their chemical history. In this poster, we present first results on the study of the luminosity-metallicity relation (LMR) in galactic systems formed in a LCDM scenario. We use a chemodynamical model coupled to the entropy conservation code Gadget2, which includes the chemical production of SN II and SN Ia. We found evolution in the zero point and slope of the luminosity-metallicity relation, in agreement with observations. We discuss the origin of the change of the LMR and the relation between the LMR and mass-metallicity relation. We also assess the possible impact that energy feedback might have on these relations.