The mass-metallicity-kinematics relation of the stellar components of EAGLE galaxies

LARA-LÓPEZ, MARITZA A.; ZENOCRATTI, LUCAS JESÚS; THEUNS, TOM; DE ROSSI, MARÍA EMILIA

Congreso; 62a Reunión de la Asociación Argentina de Astronomía; 2020

In this work, we study the stellar mass ? stellar metallicity relation as a function of the morpho-kinematics of galaxies in eagle cosmological simulations. According to our findings, at a given stellar mass (M*), stellar metallicity shows a secondary dependence on the morpho-kinematics of galaxies, which is more evident towards high masses. At the high-mass end (M* > 10^10 Msun ), dispersion-supported systems show lower metallicities, on average. In addition, low-mass galaxies with higher rotational support are somewhat more metal-poor. More massive galaxies tend to exhibit flatter morphologies, being prolate systems less metal-enriched, on average. As the redshift z increases, those aforementioned dependences of metallicity on kinematics and morphology tend to become stronger at high masses. These trends are consistent with the dependences of the stellar mass ? gas-phase metallicity relation on gas fraction, star formation rate and stellar age, and the relation of the latter quantities with galaxy morpho-kinematics.