Fig. 4
Frequency variation δn (31) for 1 00 000 initial conditions binned in a 160 × 75 grid with ε = 10−5 and γ = 1. The black curve is the Hill critical AMD 
(30), the purple curve is the collisional critical AMD Cc (Laskar & Petit 2017), and the green curve is the critical AMD obtained from the overlap of first-order MMR 
(Petit et al. 2017). Each bin is average over about eight initial conditions.
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