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astro-ph1995
On the Oxygen Abundance of Neutral Gas in I Zw 18
Max Pettini, Keith Lipman
Whether the H II regions of dwarf emission-line galaxies are self-polluted by the nucleosynthetic products of massive stars remains an open question, despite recent claims to the c…
astro-ph1995
Element Abundances at High Redshifts: The N/O Ratio at Low Metallicity
K Lipman, M Pettini, R Hunstead
Our knowledge of galactic chemical evolution is currently limited to observations of Milky Way stars and H II regions of nearby galaxies. Damped Lyman~ systems offer a new appro…