W. J. Maciel -
Abstract #146
THE EVOLUTION OF THE GALACTIC BULGE FROM PLANETARY NEBULAE
W. J. Maciel, R. D. D. Costa, A. V. Escudero
IAU Symposium 245 - Formation and evolution of galactic bulges, Ed. M. Bureau, E. Athanassoula, B. Barbuy, 365-366 (2007) We have used our dataset on the abundances of planetary nebulae (PN) to study the chemical evolution of the Galactic bulge. We have derived several relations involving the chemical abundances and computed three classes of models for the Galactic bulge: (i) one-zone, single-infall models, (ii) one-zone, double-infall models and (iii) multizone, double infall models. We conclude that part of the observational data can be understood in terms of the simpler models, but the full understanding of all observational constraints can only be explained by more complex multizone models.
