In this work we have assumed a Hernquist model with an inside-out formation for the Galactic bulge and, using a chemical evolution model, we were able obtain the bulge metallicity distribution function (MDF) for different radial regions. The preliminary results show that in the inner regions of the bulge the MDF has a higher fraction of metal poor stars, while this fraction is progressively diminished as moving outwards in the bulge. These results may explain the metallicity gradient observed in the Galactic bulge.
O. Cavichia and M. Molla
Wed, 6 Dec 17
Comments: 2 pages, 2 figures, to appear in the proceedings of the “XLI Annual Meeting of the Brazilian Astronomical Society”