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Fig. 7

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Same as Fig. 6 but for GJ 581b, and c (5:2 MMR). The top x-axis (Δt2/ Δt1) is scaled using the value κ ≈ 15 obtained in Eq. (87). We note that M1 varies only between (center of libration) and 90° (separatrix), because the resonant combination is 5M2 − 2M1 (factor 2 in front of M1).

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