Alpha-enhanced stars with anomalous ages

Alpha-enhanced stars with young ages are stars in the Milky Way that exhibit enhanced abundances of α-capture elements (typically expressed as high [α/Fe]) while simultaneously showing age indicators that appear inconsistent with the standard expectation that α-enhanced stellar populations are predominantly old. This phenomenon is discussed in the context of Galactic archaeology and challenges simple interpretations of age–abundance relations in the Galactic disk.

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