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The evolution of the Galactic bulge from planetary nebulae

Published online by Cambridge University Press:  01 July 2007

Walter J. Maciel ,
R. D. D. Costa  and
A. V. Escudero
Walter J. Maciel
Affiliation:
Astronomy Department, University of São Paulo, Rua do Matão 1226, 05508-900 São Paulo SP, Brazil e-mail: maciel@astro.iag.usp.br, roberto@astro.iag.usp.br
R. D. D. Costa
Affiliation:
Astronomy Department, University of São Paulo, Rua do Matão 1226, 05508-900 São Paulo SP, Brazil e-mail: maciel@astro.iag.usp.br, roberto@astro.iag.usp.br
A. V. Escudero
Affiliation:
Astronomy Department, University of São Paulo, Rua do Matão 1226, 05508-900 São Paulo SP, Brazil e-mail: maciel@astro.iag.usp.br, roberto@astro.iag.usp.br
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Abstract

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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.

Keywords

planetary nebulae: generalGalaxy: bulgeGalaxy: abundances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S245: Formation and Evolution of Galaxy Bulges , July 2007 , pp. 365 - 366
Copyright
Copyright © International Astronomical Union 2008

References

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