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Chemistry of Stars in the Sculptor Dwarf Galaxy from VLT-FLAMES

Published online by Cambridge University Press:  23 December 2005

Kim A. Venn  and
V. Hill
Kim A. Venn
Affiliation:
Macalester College, 1600 Grand Avenue, Saint Paul, MN, 55105 Department of Physics & Astronomy, University of Victoria, Victoria, Canada email: venn@macalester.edu
V. Hill
Affiliation:
GEPI, Observatoire de Meudon, CNRS UMR 8111, France email: Vanessa.Hill@obspm.fr
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Abstract

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The chemical composition of 91 stars in the Sculptor dwarf spheroidal galaxy is presented as determined from spectra taken with the FLAMES multiobject spectrograph in the Medusa mode. The analysis methods are outlined. The [α/Fe] ratios are shown for Mg, Ca, and Ti, and compared with those of Galactic stars. Heavy element abundance ratios (Y, Ba, and Eu) are also presented. Since the Sculptor dwarf galaxy has had a significantly different star formation history and chemical evolution than the Galaxy, then comparison of Sculptor's metal-poor (old) stars to similar metallicity stars in the Galaxy can be used to discuss galaxy formation scenarios, as well as test some of our fundamental assumptions in stellar nucleosynthesis.

Keywords

Stars: abundancesGalaxy: abundancesformationevolutiongalaxies: abundancesdwarfevolutionLocal Group
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Symposium S228: From Lithium to Uranium: Elemental Tracers of Early Cosmic Evolution , May 2005 , pp. 513 - 518
Copyright
© 2005 International Astronomical Union