Input probability distributions for the orbital statistical model. a) Distribution of initial planets’ radius, R₀, in the precursor compact systems whose properties are listed in Dataset S3. b) Distribution of initial planets’ mass, M₀, in the compact systems (Dataset S3). c) Distribution of the relative impact velocity in units of Keplerian velocity, v_∞/v_k, assumed in the statistical model of Section 2.2.2. d) Distribution of the impact angle, θ assumed for the collision model in Section 2.2.2. The different curves are for the nominal case (N0) and the robustness tests (T1–T6).