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astro-ph2004
Chemical Composition of Planetary Nebulae: The Galaxy and the Magellanic Clouds
W. J. Maciel, R. D. D. Costa, T. E. P. Idiart
An analysis is made of the abundances of planetary nebulae (PN) in the Galaxy (MW), the Large Magellanic Cloud (LMC) and the Small Magellanic Cloud (SMC). The data has been gathere…
astro-ph2004
A comparison of the time variation of radial abundance gradients from planetary nebulae and open clusters
W. J. Maciel, R. D. D. Costa, P. A. L. Ferreira
The temporal behaviour of the radial abundance gradients has important consequences on models for the chemical evolution of the Galaxy. We present a comparison of the time variatio…