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Chemical similarities between the Galactic bulge and local thick disk red giant stars: analysis from optical data

Published online by Cambridge University Press:  09 March 2010

Alan Alves-Brito ,
Jorge Meléndez  and
Martin Asplund
Alan Alves-Brito
Affiliation:
Universidade de São Paulo, IAG email: abrito@astro.iag.usp.br
Jorge Meléndez
Affiliation:
Centro de Astrofísica da Universidade do Porto, Portugal
Martin Asplund
Affiliation:
Max Planck Institut für Astrophysik, Germany
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Abstract

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The Galactic structure and composition remain as one of the greatest open problems in modern astrophysics. We show here that there are chemical similarities between the Galactic bulge and local thick disk red giant stars. This finding puts strong constraints on the IMF, SFR and chemical enrichment timescale of the bulge and thick disk. Our results are based upon a detailed elemental abundance analysis of 80 high S/N and high resolution optical spectra of giant stars, in the range −1.5 < [Fe/H] < +0.5.

Keywords

stars: abundancesGalaxy: bulgeGalaxy: disk
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S265: Chemical Abundances in the Universe: Connecting First Stars to Planets , August 2009 , pp. 342 - 343
Copyright
Copyright © International Astronomical Union 2010

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