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| Paper: |
Unfolding the Milky Way Bulge |
| Volume: |
458, Galactic Archaeology: Near-Field Cosmology and the Formation of the Milky Way |
| Page: |
191 |
| Authors: |
Gonzalez, O. A.; Rejkuba, M.; Zoccali, M.; Valenti, E.; Minniti, D. |
| Abstract: |
Recent studies attempting to characterize the stellar populations and morphology of the Milky Way bulge suggest that the Bulge structure and stellar population mixture could be more complicated than previously thought, with results which might even appear contradictory. A large scale mapping of the Bulge is necessary to make significant progress. We present here our results based on alpha elements abundances for a total of 650 RGB stars in 4 fields across the Bulge. Results point towards a spatial homogeneity of alpha element enhancement in the metal-poor regime and a population of alpha-poor metal-rich stars which disappears at high latitudes (b = –12°). Further constrains are being obtained from the VVV public survey from which we are deriving a high-resolution extinction map as well as the general picture of structure and metallicity gradients in the Bulge. |
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