Sofia Feltzing, Thomas Bensby, Jorge Meléndez, Daniel Adén, Martin Asplund, Andy Gould, Jennifer Johnson, Sara Lucatello, Avishay Gal-Yam
Published 2011-10-20, updated 2011-10-26Version 2
Galactic bulges are central to understanding galaxy formation and evolution. Here we report on recent studies using micro-lensing events to obtain spectra of high resolution and moderately high signal-to-noise ratios of dwarf stars in the Galactic bulge. Normally this is not feasible for the faint turn-off stars in the Galactic bulge, but micro-lensing offers this possibility. Elemental abundance trends in the Galactic bulge as traced by dwarf stars are very similar to those seen for dwarf stars in the solar neighbourhood. We discuss the implications of the ages and metallicity distribution function derived for the micro-lensed dwarf stars in the Galactic bulge.
Comments: Contributed talk at the "Assembling the puzzle of the Milky Way" conference, April 17-22, 2011, in Le Grand-Bornand, France. Will be published in EPJ Web of Conferences (Edited by C\'eline Reyl\'e, Annie Robin and Mathias Schultheis) v2 has updated reference list
Chemical evolution of the Galactic bulge: different stellar populations and possible gradients
Planetary nebulae and the chemical evolution of the galactic bulge: new abundances of older objects
Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars. III. Detection of lithium in the metal-poor bulge dwarf MOA-2010-BLG-285S
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