Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics
Scientific paper
2011-10-20
Astronomy and Astrophysics
Astrophysics
Galaxy Astrophysics
Contributed talk at the "Assembling the puzzle of the Milky Way" conference, April 17-22, 2011, in Le Grand-Bornand, France. W
Scientific paper
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.
Adén Daniel
Asplund Martin
Bensby Thomas
Feltzing Sofia
Gal-Yam Avishay
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