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Fig. 6


Distribution of the initial semimajor axes of the outer planet in a system composed of two super-Earths in a 2:1 resonance for different values of the disk gas density. For higher densities the resonant region is shifted inwards. The upper panel models a pair of planets with the inner one at 5 au, while the lower panel models the case where the inner planet is at 1 au.

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