Maximum Be fraction, Φ_Be, in a coeval population as defined by Eq. (30) plotted as a function of fractional main-sequence turn-off mass, M/M_TO, for varying parameters. Left and right panels: ΔM/M_2, i = 0 and 1, respectively. The colour of the lines represents differing κ values. Red is κ = 0 and blue is κ = −1. Dashed lines show α = −1.9 and solid lines show α = −2.7, as indicated by the annotations.