W. J. Maciel - Abstract #45


RADIAL ABUNDANCE GRADIENTS AND THE SIMPLE MODEL FOR THE CHEMICAL EVOLUTION OF THE GALAXY

W. J. Maciel

Astrophys. Space Sci. 196, 23-28 (1992)

The oxygen abundance gradient relative to hydrogen is considered, as derived from galactic HII regions and type II planetary nebulae. The so-called `simple' model for the chemical evolution of the Galaxy is shown to explain well the observed gradients, provided some reasonable assumptions are made regarding the gas distribution in the galactic disk.

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