Fig. A.2.
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Top row: E-MILES base models compared to line indices data points from our sample. Bottom row: E-MILES model grids used to compute the [Mg/Fe] enhancement, using the light-weighted age of the models and ppxf to make the grids orthogonal, and this is better defined in the old and metal-poor regime. LEWIS galaxies are colour-coded as in Fig. 1
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