Solid lines: expected 1σ detection thresholds for PLATO for different scenarios, as a function of the planet’s orbital period. Red lines are for Neptune-like planets (r/R_∗ = 0.035) and blue are for Jupiter-like planets (r/R_∗ = 0.1), while the solid, dashed, and dot-dashed line sets (from top to bottom) are for minimal, good, and best-case scenarios, respectively, as described in the text. Dots: D_expect of some of the known exoplanets. PLATO planets are likely to have a higher D_expect than the current population (see text).