Abundance ratios in Galactic bulge stars

We discuss how abundance ratios can help unravel the evolutionary history of the Galactic bulge. An LTE abundance analysis of a solar-[Fe/H] bulge red giant star reveals that the su-elements O, Mg, Si, Ca and Ti are enhanced by +0.3 dex, the r-process element Eu is enhanced by +0.5 dex and the Ba/Eu ratio is -0.5. These ratios are characteristic of normal halo composition, and suggest that the bulge reached solar [Fe/H] in less than 1Gyr.