The Helium to Heavy Elements Enrichment Ratio
作者： M. Peimbert
DOI: 10.1007/978-3-540-49169-9_24
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摘要: A review on ΔY/ΔZ and ΔY/ΔO determinations is presented. Results based galactic extragalactic gaseous nebulae are analyzed. The temperature structure of the taken into account as well fraction O atoms tied up in dust grains. best compared with chemical evolution models solar vicinity metal poor galaxies. relevance this comparison to presence of: black holes, different types outflows inhomogeneities H II regions discussed.
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