%0 Journal Article
%T The Gaia-ESO Survey: the most metal-poor stars in the Galactic bulge
%A L. Howes
%A M. Asplund
%A A. R. Casey
%A S. C. Keller
%A D. Yong
%A G. Gilmore
%A K. Lind
%A C. Worley
%A M. S. Bessell
%A L. Casagrande
%A A. F. Marino
%A D. M. Nataf
%A C. I. Owen
%A G. S. Da Costa
%A B. P. Schmidt
%A P. Tisserand
%A S. Randich
%A S. Feltzing
%A A. Vallenari
%A C. Allende Prieto
%A T. Bensby
%A E. Flaccomio
%A A. J. Korn
%A E. Pancino
%A A. Recio-Blanco
%A R. Smiljanic
%A M. Bergemann
%A M. T. Costado
%A F. Damiani
%A U. Heiter
%A V. Hill
%A A. Hourihane
%A P. Jofr¨¦
%A C. Lardo
%A P. de Laverny
%A L. Magrini
%A E. Maiorca
%A T. Masseron
%A L. Morbidelli
%A G. G. Sacco
%A D. Minniti
%A M. Zoccali
%J Physics
%D 2014
%I arXiv
%R 10.1093/mnras/stu1991
%X We present the first results of the EMBLA survey (Extremely Metal-poor BuLge stars with AAOmega), aimed at finding metal-poor stars in the Milky Way bulge, where the oldest stars should now preferentially reside. EMBLA utilises SkyMapper photometry to pre-select metal-poor candidates, which are subsequently confirmed using AAOmega spectroscopy. We describe the discovery and analysis of four bulge giants with -2.72<=[Fe/H]<=-2.48, the lowest metallicity bulge stars studied with high-resolution spectroscopy to date. Using FLAMES/UVES spectra through the Gaia-ESO Survey we have derived abundances of twelve elements. Given the uncertainties, we find a chemical similarity between these bulge stars and halo stars of the same metallicity, although the abundance scatter may be larger, with some of the stars showing unusual [{\alpha}/Fe] ratios.
%U http://arxiv.org/abs/1409.7952v2