Radial abundance gradients and the simple model for the chemical evolution of the Galaxy |
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| Authors: | W J Maciel |
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| Institution: | (1) Instituto Astronómico e Geofísico da USP, São Paulo, SP, Brazil |
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| Abstract: | The oxygen abundance gradient relative to hydrogen is considered, as derived for 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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