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Elemental abundances in the Galactic bulge from microlensed dwarf stars

Published online by Cambridge University Press:  09 March 2010

T. Bensby ,
S. Feltzing ,
J. A. Johnson ,
A. Gould ,
H. Sana ,
A. Gal-Yam ,
M. Asplund ,
S. Lucatello ,
J. Melendez  and
A. Udalski
...Show all authors
T. Bensby
Affiliation:
European Southern Observatory, Santiago, Chile
S. Feltzing
Affiliation:
Lund Observatory, Lund, Sweden
J. A. Johnson
Affiliation:
Dept of Astronomy, Ohio State University, Columbus, Ohio, USA
A. Gould
Affiliation:
Dept of Astronomy, Ohio State University, Columbus, Ohio, USA
H. Sana
Affiliation:
Univ. van Amsterdam, Sterrenkundig Instituut ‘Anton Pannekoek’, Amsterdam, Netherlands
A. Gal-Yam
Affiliation:
Benoziyo Center for Astrophyics, Weizmann Institute of Science, Rehovot, Israel
M. Asplund
Affiliation:
Max Planck Institute for Astrophysik, Garching, Germany
S. Lucatello
Affiliation:
INAF-Astronomical Observatory of Padova, Padova, Italy
J. Melendez
Affiliation:
Centro de Astrofisica da Universidade do Porto, Porto, Portugal
A. Udalski
Affiliation:
Warsaw University Observatory, Warszawa, Poland
D. Kubas
Affiliation:
Institut d'Astrophysique de Paris, Paris, France
G. James
Affiliation:
European Southern Observatory, Garching, Germany
D. Adén
Affiliation:
Lund Observatory, Lund, Sweden
J. Simmerer
Affiliation:
Lund Observatory, Lund, Sweden
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Abstract

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We present elemental abundances of 13 microlensed dwarf and subgiant stars in the Galactic bulge, which constitute the largest sample to date. We show that these stars span the full range of metallicity from Fe/H= −0.8 to +0.4, and that they follow well-defined abundance trends, coincident with those of the Galactic thick disc.

Keywords

Galaxy: bulgeGalaxy: abundancesGalaxy: diskGalaxy: evolution
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. 346 - 347
Copyright
Copyright © International Astronomical Union 2010

References

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