Elemental abundances in the Galactic bulge from microlensed dwarf stars
T. Bensby (1), S. Feltzing (2), J.A. Johnson (3), A. Gould (3), H., Sana (4), A. Gal-Yam (5), M. Asplund (6), S. Lucatello (7), J. Melendez (8),, A. Udalski (9), D. Kubas (10), G. James (11), D. Ad\'en (2), J. Simmerer (2), ((1) ESO Chile, (2) Lund Observatory
TL;DR
This study analyzes elemental abundances in 13 microlensed dwarf stars in the Galactic bulge, revealing their metallicity range and similarity to the thick disc, providing insights into the bulge's chemical evolution.
Contribution
First comprehensive analysis of elemental abundances in microlensed dwarf stars in the Galactic bulge, expanding understanding of its chemical composition.
Findings
Stars span metallicity from Fe/H=-0.8 to +0.4
Abundance trends match those of the Galactic thick disc
Largest sample of microlensed dwarf stars in the bulge
Abstract
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.
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