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- W2124733828 abstract "The chemical enrichment and stellar abundance ratios of galaxies that form in a hierarchical clustering scheme are calculated. For this purpose, I adopt the star formation histories (SFH) as they are delivered by semi-analytic models by Kauffmann. It turns out that the average SFH of cluster ellipticals does not yield globally α-enhanced stellar populations. The starburst that occurs when the elliptical forms in the major merger therefore plays a crucial role in producing α-enhancement. Only under the assumption that the initial mass function is significantly flattened with respect to the Salpeter value during the burst, can a Mg/Fe overabundant population be obtained. In particular, for the interpretations of radial gradients in metallicity and α-enhancement, the mixing of global and burst populations are of great importance. The model predicts bright field galaxies to be less α-enhanced than their counterparts in clusters." @default.
- W2124733828 created "2016-06-24" @default.
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- W2124733828 date "1999-07-01" @default.
- W2124733828 modified "2023-10-14" @default.
- W2124733828 title "Abundance ratios in hierarchical galaxy formation" @default.
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- W2124733828 doi "https://doi.org/10.1046/j.1365-8711.1999.02552.x" @default.
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