Fig. 3
Comparison of the correlations between age and [α/Fe] for three different prescriptions for the DTD of SNeIa in the Y13 model. Upper left panel: the luminosity-weighted average properties of early-type galaxies from W15. The solid line is a formal fit to the two regimes, separated at 9 Gyr and repeated in all the other panels. Upper right panel: the luminosity-weighted average properties of early-type galaxies in the semi-analytic model of Y13, using a Gaussian DTD. Lower left panel: the luminosity-weighted average properties of early-type galaxies in the semi-analytic model of Y13 using a power law DTD. Lower right panel: the luminosity-weighted average properties of early-type galaxies in the semi-analytic model of Y13 using a bimodal DTD.
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