Fig. 3

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Hα luminosity (logarithmic scale) of stars with ages of 1–4 Myr as a function of the initial mass, mini. The colour indicates the metallicity, and the marker indicates the age. Note that the 1–3 Myr points are largely superposed by the 4 Myr data. In Appendix A, the data for each age are displayed in a separate figure for clarity.
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