Determination of reddening and age for ten Large Magellanic Cloud star clusters from integrated spectroscopy

AHUMADA, A. V., VEGA, L. R., CLARIÁ, J. J., ODDONE, M. A., PALMA, T.

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC

UNIV CHICAGO PRESS

Lugar: Chicago; Año: 2016

0004-6280

We present flux-calibrated integrated spectra in the optical range(3700-6800 Å​) obtained at Complejo Astronómico El Leoncito (CASLEO,Argentina) for a sample of 10 concentrated star clusters belonging tothe Large Magellanic Cloud (LMC). No previous data exist for two ofthese objects (SL 142 and SL 624), while most of the remaining clustershave been only poorly studied. We derive simultaneously foreground E(B-V) reddening values and ages for the cluster sample by comparingtheir integrated spectra with template LMC cluster spectra and with twodifferent sets of simple stellar population models. Cluster reddeningvalues and ages are also derived from both available interstellarextinction maps and by using diagnostic diagrams involving the sum ofequivalent widths of some selected spectral features and theircalibrations with age, respectively. For the studied sample, we deriveages between 1 Myr and 240 Myr. In an effort to create a spectrallibrary at the LMC metallicity level with several clusters per age range, the cluster sample.