1991 · 14 citations · 0 references
Natural SciencesAstronomyPhysicsAstrophysicsSolar AstronomyStellar AstronomyGalactic EvolutionStellar EvolutionStellar PopulationsYoung Stellar ObjectsAge-metallicity RelationsGalactic Disk EvolutionMetallicity EvolutionMetallicity MeasurementStellar Age DeterminationStellar Age EvolutionStellar AgesStellar Metallicity Determination
The uvbyβ data presented by Twarog B. A. (1980, ApJS, 44) and Gronbech B. and Olsen E. H. (1976, A&AS, 25 et 1977, A&AS, 27) are reanalysed with the aim to derive the age-metallicity relation (AMR) of the nearby stars. The method adopted is similar to that outlined by Twarog (1980, ApJ, 242) and Calberg et al. (1985, ApJ, 294), however, with a recalibration of the metallicity index δm 1 and improvements in some details. For a subsample of the stars, the age-velocity dispersion relation (AVR) is estimated. Both the AMR and the AVR show a significant trend with age during the evolution of the galactic disk