Fig. 2
Dynamical evolution of the planetary embryos in the protoplanetary disk. The mass increase of the planets is shown in the bottom-right panel. The orbital decay is shown in the top-left panel. The top-right panel shows the mean-motion ratio as a function of time. The evolution of the eccentricity is shown in the bottom-left panel, the crossing of the 2/1 and 3/2 MMRs are indicated. Finally, the capture in the 4:3 MMR occurs at ~0.8 Myr.
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