Determinación espectroscópica de enrojecimientos y edades de cúmulos abiertos de pequeño diámetro angular

M.A. ODDONE, J.J. CLARIÁ , A.V. AHUMADA

San Juan

Congreso; 59 Reunión Anual de la Ascociación Argentina de Astronomía; 2016

As part of a systematic project of integrated spectroscopic observationsof small angular size Galactic open clusters (OCs), we presentpreliminary results (basically reddenings and ages) obtained for fourOCs located in the third and fourth Galactic quadrants (ESO206-SC06,Ruprecht75, Sher1 and NGC3590). The spectra were obtained at ComplejoAstronomico El Leoncito (CASLEO, Argentina) using the ``Jorge Sahade´´2.15 m telescope. Together with other spectra previously obtained atCASLEO using the same instrument and applying the same technique, thepresent spectra will be used to improve the current available spectraltemplate libraries of typically solar metallicity. The present resultssuggest that ESO260-SC06, aged about (2.5 1.0) Gyr, is probably mucholder than previously believed. On the other hand, integratedspectroscopy applied to Ruprecht75, Sher1 and NGC3590 leads to clusterages consistent with those derived from optical and near-infraredphotometric studies, but it yields slightly smaller reddening values.