The galactic disc age-metallicity relation

Details The galactic disc age-metallicity relation The galactic disc age-metallicity relation

1997-09-18

arxiv.org/abs/astro-ph/9709182v1

Astronomy and Astrophysics

Astrophysics

4 pages LaTeX, 3 postscript figures, to appear in proceedings ``1997 Pacific RIM conference on Stellar Astrophysics'', August

Scientific paper

New ages are computed for stars in the Solar Neighbourhood from the Edvardsson et al. (1993) data set. Distances derived from the Hipparcos parallaxes were adopted to obtain reliable ages (uncertainty less than 12%) for a subset of stars. There is no apparent age-metallicity relation for stars with an age less than 10 Gyr. Only if we consider older stars a slope of ~0.07 dex/Gyr appears. This relation is compared with those obtained from other methods, i.e. galactic open clusters, stellar population synthesis (star counts), and chemical evolution models.

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