Estudio de cúmulos estelares de la Nube Menor de Magallanes: fotometría de Washington de 14 cúmulos de edad intermedia

IATTI, A. E.; CLARIÁ, J. J.; BICA, E.; GEISLER, D.; AHUMADA, A. V.; GIRARDI, L.

Congreso; 54 Reunión Anual de la Asociación Argentina de Astronomía; 2011

We present CCD photometry in the Washington system C and T1 bands of 14 star clusters of the Small Magellanic Cloud (SMC). We determine ages and metallicities using theoretical isochrones, the T1 parameter and the Red Giant Standard method. Excepting IC 1708, all the observed clusters are aged between 1 and 6.3 Gyr, while their metallicities ([Fe/H]) range be- tween -0.7 and -1.4. Two important cluster formation episodes in the SMC, dated at 2 Gyr and 5 Gyr ago, were detected. During approximately the first 4 Gyr in the SMC lifetime, the cluster formation rate turned out to be constant. A detailed version of this work can be seen in Piatti et al. (2011, MNRAS, 417, 1559).