Planetary nebulae and the chemical evolution of the galactic bulge

Details Planetary nebulae and the chemical evolution of the galactic bulge Planetary nebulae and the chemical evolution of the galactic bulge

2005-08-31

arxiv.org/abs/astro-ph/0508693v1

AIP Conf.Proc.804:252-256,2006

Astronomy and Astrophysics

Astrophysics

4 pages, 4 figures, to appear in the proceedings of the conference "Planetary Nebulae as astronomical tools" held in Gdansk, P

Scientific paper

10.1063/1.2146287

Electron temperatures, densities, ionic and elemental abundances of helium, nitrogen, oxygen, argon, sulfur and neon were derived for a sample of bulge planetary nebulae, representative of its intermediate mass population. Using these results as constraints, a model for the chemical evolution of the galactic bulge was developed. The results indicate that the best fit is achieved using a double-infall model, where the first one is a fast collapse of primordial gas and the second is slower and enriched by material ejected by the bulge itself during the first episode.

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