The chemical evolution of gas-rich dwarf galaxies
T. I. LarsenCopenhagen University Observatory, Juliane Maries Vej 30, DK-2100 Copenhagen , DenmarkJesper Sommer‐LarsenTheoretical Astrophysics Center, Juliane Maries Vej 30, DK-2100 Copenhagen , DenmarkB. E. J. PagelAstronomy Centre, CPES, University of Sussex, Brighton BN1 9QJ
ABI
Abstract
In an effort to understand the evolution of N, O and He abundances in gas-rich dwarf galaxies, we investigate the dispersion and mixing of supernova ejecta in relation to H ii region evolution and develop a numerical model of chemical evolution based on a doublebursting mode of star formation (with an interval of the order of 3 10 7 yr between bursts of a pair) which has been designed to account for the existence of significant scatter in the N=OO=H relation.
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