Estudio de la evolución química reciente de la Nube Mayor de Magallanes

PALMA, T.; CLARIÁ, J. J.; GEISLER, D.; AHUMADA, A. V.

Tandil

Congreso; 56 Reunión Anual de la Asociación Argentina de Astronomía; 2013

Based on Washington photometric observations carried out with the Vıctor Blanco 4 m telescope at Cerro Tololo Inter-American Observatory (Chile), we examine the Large Magellanic Cloud (LMC) recent chemical evolution. As tracers of the LMC metallic enrichment, we observed and used 81 star clusters projected on different regions of the galaxy. Our sample includes 44 previously unstudied clusters. We find that the more metal-rich clusters are mainly located in the inner disc, while more metal-poor clusters are distributed throughout the entire disc. Intermediate-age clusters tend to be located at greater deprojected Galactocentric distances while the youngest ones are mainly found in the inner disc. These trends are maintained when the sample is complemented with others found in the literature and studied with the same technique. The resulting age-metallicity relationship appears to be independent of which LMC region is considered.