Age-Metallicity Relation: Comparison of Open Clusters’ Data with Stellar Populations

  • Giovanni Carraro
  • Yuen K. Ng
Conference paper
Part of the International Astronomical Union / Union Astronomique Internationale book series (IAUS, volume 171)


The age-metallicity relation (AMR) from the Old Open Clusters population (Carraro & Chiosi, 1994; Friel & Janes, 1993) is compared with the disc stellar populations obtained from a recently developed model of the Milky Way by Ng 1994. A picture for the chemical evolution of the disc is presented in which the presence of a newly discovered Bar population (t = 8-9 Gyr, Z = 0.005–0.030) is taken into account. We suggest that the past history of the Galactic Disc has been significantly influenced by infall of metal poor gas from the halo and accretion events. The results are shown in Fig. 1.


  1. Carraro, G. & Chiosi, C. 1994, Astr. & Astrophys. 287, 761.ADSGoogle Scholar
  2. Friel, E. D. & Janes, K. A. 1993, Astr. & Astrophys. 267, 75.ADSGoogle Scholar
  3. Ng, Y. K. 1994, PhD. Thesis, Leiden Observatory, the Netherlands.Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1996

Authors and Affiliations

  • Giovanni Carraro
    • 1
  • Yuen K. Ng
    • 2
  1. 1.Department of AstronomyPadova UniversityPadovaItaly
  2. 2.Leiden ObservatoryLeidenthe Netherlands

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