Using 3D NLTE models, the authors report that the spread in [Mg/Fe] among metal-poor halo stars with -3.5 < [Fe/H] < -2 is only about 0.06 dex, implying more homogeneous early chemical enrichment than previously inferred.
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How homogeneous was the chemical enrichment of the Milky Way 13 gigayears ago?
Using 3D NLTE models, the authors report that the spread in [Mg/Fe] among metal-poor halo stars with -3.5 < [Fe/H] < -2 is only about 0.06 dex, implying more homogeneous early chemical enrichment than previously inferred.