Further developments in star cluster spectral libraries

AHUMADA, A.V.; CLARIÁ, J.J.; BICA, E.; PIATTI, A.E.; SANTOS, J.F.C.; TALAVERA, M.L.; PALMA, T.; PAVANI, D.B.; PARISI, M. C.; TORRES, M. C.; DUTRA, C.M.

Rio de Janeiro, Brasil

Simposio; IAU Symposium 266: Star Clusters Basic Galactic Building Blocks throughout Time And Space; 2009

IAU

We present flux-calibrated integrated spectra in the optical spectral range of Galactic open clusters (GOCs) and Magellanic Clouds’ (MCs) stellar clusters (SCs) obtained at CASLEO (Argentina). The SC parameters were derived from the equivalent width (EW) method and from the template matching procedure by comparing the line strengths and continuum distribution of the cluster spectra with those of template spectra with known parameters. MCs cluster reddeningvalues were also estimated by interpolation between the available extinction maps. The derived ages for the GOCs range from 3 Myr to 4 Gyr, while those of the MCs’ SCs vary from 3 Myr to 7 Gyr. E(B-V) colour excess values in the MCs appear to be all lower than 0.17, while those of the GOCs range from 0.00 to 2.40. The present data led us to upgrade the spectral libraries of reference spectra or templates of solar-metallicity and MCs metallicities.