ON THE AGES OF THE GALACTIC CLUSTERS NGC 188 M67 AND NGC 6791
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UNAM, Boletín de Observatorios Tonatzintla y Tacubaya, México.
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Abstract
Theoretical isochrones for three chemical compositions are presented and compared to the color-magnitude diagrams of NGC 188, M67 and NGC 6791. The metal abundances that provide the best agreement between theory and observations for NGC 188 are in the ran