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Fig. 11

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Extent of migration Δa = a − astart as a function of the disk lifetime τdisk for synthetic planets eventually ending up as giant planets (M ≥ 300   M). Symbols indicate relative surface densities of planetesimals ΣSS,SN: red filled squares are low ΣSS,SN < 2. Black triangles are intermediate ΣSS,SN (2 to 4), and green open circles are disks with a high ΣSS,SN > 4. The solid line indicates the very roughly linear behavior of Δa as a function of τdisk. There are however large systematic departures from this simple dependence.

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