Spectroscopic study of blue compact and high surface brightness star clusters in the Large Magellanic Cloud

TALAVERA, M. L.; AHUMADA, A. V.; CLARIÁ, J. J.; SANTOS, J. F. C.; BICA, E.; PARISI, M. C., JR.

Malargue

Congreso; 50º Reunión de la Asociación Argentina de Astronomía; 2007

Integrated spectroscopy in the optical range of a sample of 25 blue compact and high surface brightness Large Magellanic Cloud (LMC) star clusters is presented. Cluster reddening values were estimated from the template marching method and from available interstellar extinction maps, while cluster ages were derived from the template matching and equivalent width (EWs) methods. In the latter case, age/metallicity calibrations were used together with diagnostic diagrams involving the sum of EWs of selected spectral lines. Fifteen of the 25 clusters do not present previous studies, so that the parameters here presented are the first of their kind. The derived cluster ages range from ~ 5 Myr (SL 360) to ~ 800 Myr (NGC 2137). The present cluster sample complements previous ones, in an attempt to provide a spectral library with several clusters per age interval.