Model light curves produced by the optically thick tail described in Sect. 3.2 at wavelengths of 0.65 μm (solid blue), 0.85 μm (dashed orange) and 2.5 μm (dot-dashed red) compared with the Kepler long-cadence light curve of Kepler-1520 b (black). The model light curves are convolved to the Kepler long-cadence of 30 min. This tail was produced by ejecting particles with a spherically symmetric distribution from a planet of mass 8.4 × 10⁻⁶ M_⊕ and radius of0.020 R_⊕ at a velocity of 413 m s⁻¹) (1.8 times the planetary surface escape velocity) and scaling its final dust mass to 1.2 × 10¹⁶ kg, or a dust mass-loss rate of 4.8 × 10³ M_⊕ Gyr⁻¹ (600 times higher than the tail mass that produced Fig. 9) to make it completely optically thick.