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

Published online by Cambridge University Press:  25 May 2016

Giovanni Carraro  and
Yuen K. Ng
Giovanni Carraro
Affiliation:
Department of Astronomy, Padova University, Vicolo dell'Osservatorio 5, 35122 Padova, Italy
Yuen K. Ng
Affiliation:
Leiden Observatory, P.O. Box 9513, 2300 RA Leiden. the Netherlands

Extract

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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.

Type
Poster Papers
Information
Symposium - International Astronomical Union , Volume 171: New Light on Galaxy Evolution , 1996 , pp. 351
Copyright
Copyright © Kluwer 1996 

References

Carraro, G. & Chiosi, C. 1994, Astr. & Astrophys. 287, 761.Google Scholar
Friel, E. D. & Janes, K. A. 1993, Astr. & Astrophys. 267, 75.Google Scholar
Ng, Y. K. 1994, , .Google Scholar