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Fig. 3

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[α/Fe] abundance ratios versus time. The shaded areas represent the observed values and the 99.6% uncertainties in NGC 4472 from Loewenstein & Davis (2010). Results for [Mg/Fe]. Upper row: fiducial model 1a (solid) compared to model 1afd (dashed). Middle row: fiducial model 1a (solid) compared to models 1c (dotted), 2a (dashed), 3a (dot-dashed), respectively. Lower row: fiducial model 1a (solid) compared to models 4a (dot-dashed) and 4c (dashed), respectively. Results for [O/Mg], [Ca/Fe] and [Si/Fe]. Models are coded as in the [Mg/Fe] column except for the model 1afd and in the upper panel that is replaced by models 1ad.The [Fe/H] evolution from Fig. 2 is also reported for comparison to the specific Fe abundance measured in NGC 4472.

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