Estimación de edades de 15 cúmulos estelares de la Nube Menor de Magallanes

By using V and I images obtained with the “Very Large Telescope” (Chile) for 15 star clusters in the Small Magellanic Cloud (SMC), we estimated their ages from the δV parameter, which is defined as the difference between the visual magnitude of the horizontal branch (or “clump”) and the corresponding visual magnitude of the turn off. We first performed the PSF photometry and then built the colour-magnitude diagrams of the clusters wherein we measured δV . This parameter, expressed in magnitudes, was calibrated by Janes & Phelps (1994) as a function of age. The ages here estimated for the 15 clusters , together with the metallicities we had previously derived applying the CaII triplet technique, allowed us to reanalize the age-metallicity relationship in the SMC.Fil: Parisi, Maria Celeste. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; ArgentinaFil: Geisler, Doug. Universidad de Concepción; ChileFil: Claria Olmedo, Juan Jose. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; ArgentinaFil: Piatti, Andres Eduardo. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; ArgentinaFil: grocholski, A J.. University of Yale; Estados UnidosFil: Sarajedini, A.. University of Florida; Estados Unido