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Abundance structure and chemical evolution of the Galactic disc

Published online by Cambridge University Press:  21 October 2010

Thomas Bensby  and
Sofia Feltzing
Thomas Bensby
Affiliation:
European Southern Observatory, Alonso de Cordova 3107, Vitacura, Santiago, Chile email: [email protected]
Sofia Feltzing
Affiliation:
Lund Observatory, Box 43, SE-221 00 Lund, Sweden email: [email protected]
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Abstract

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We have obtained high-resolution, high signal-to-noise spectra for 899 F and G dwarf stars in the Solar neighbourhood. The stars were selected on the basis of their kinematic properties to trace the thin and thick discs, the Hercules stream, and the metal-rich stellar halo. A significant number of stars with kinematic properties ‘in between’ the thin and thick discs were also observed to investigate in greater detail the dichotomy of the Galactic disc. All stars have been homogeneously analysed, using the exact same methods, atomic data, model atmospheres, etc., and also truly differentially to the Sun. Hence, the sample is likely to be free from internal errors, allowing us to, in a multi-dimensional space consisting of detailed elemental abundances, stellar ages, and the full three-dimensional space velocities, reveal very small differences between the stellar populations.

Keywords

stars: abundancesstars: kinematicsGalaxy: diskGalaxy: evolution
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Highlights H15: Highlights of Astronomy , November 2009 , pp. 789
Copyright
Copyright © International Astronomical Union 2010

References

Bensby, T., Feltzing, S., & Lundström, I. 2003, A&A, 410, 527Google Scholar
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Bensby, T., Oey, M. S., Feltzing, S., & Gustafsson, B. 2007a, ApJ, 655, L89CrossRefGoogle Scholar
Bensby, T., Zenn, A. R., Oey, M. S., & Feltzing, S. 2007b, ApJ, 663, L13CrossRefGoogle Scholar