Contour plot showing the percentage of mass lost through internal photoevaporation (ignoring accretion) around a 0.1 |$\, {\rm M}_{\odot }$| star with a viscosity parameter α = 3 × 10⁻⁴, and an initial disc mass equal to half the maximum stable disc mass (equation 14). The red lines indicate from right to left: 1 per cent (dot–dashed), 10 per cent (dashed), 50 per cent (solid), 90 per cent (dashed), and 99 per cent (dot–dashed).