ESTUDIO DEL ENRIQUECIMIENTO QUÍMICO DE GALAXIAS MASIVAS EN SIMULACIONES NUMÉRICAS COSMOLÓGICAS

R. SANTAMARÍA; M.C. ZERBO; S.E. GRIMOZZI; L.J. ZENOCRATTI; M.E. DE ROSSI; M.C. TOMASINI

Buenos Aires

Congreso; 64 Reunión Anual Asociación Argentina de Astronomía; 2022

Instituto de Astronomía y Física del Espacio (UBA-CONICET)

Different studies suggest that massive galaxies (i.e., with stellar masses M⋆ ≳ 1010 M⊙ ) seem tofollow scaling relations associated with metallicity with characteristics that differ from those corresponding toless massive systems. In this work, we analyze the origin of the scatter of the mass-metallicity relation (MZR)of massive galaxies using the eagle (Evolution and Assembly of GaLaxies and their Environment) cosmologicalsimulations. We find that, at a fixed M⋆, the gas-phase metallicity of galaxies tends to decrease, on average,with their stellar age and the mass associated with supermassive black holes. Furthermore, consistently withprevious works, we find a clear dependence of the chemical enrichment of galaxies on their morpho-kinematics.In particular, for galaxies of similar M⋆ , those with less rotational support show gas components with lowermetallicities, this trend being stronger as M⋆ increases. According to our preliminary results, the main processesthat would determine the MZR of massive galaxies would be the feedback of active galactic nuclei and galaxymergers.