Fig. 1
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Schematic picture of the disc model. Gas and dust flow onto the region r ≤ rinf of the CPD with a uniform mass flux (blue region). The gas disc expands outwards by the diffusion and is truncated at r = rout. The disc is also truncated by the magnetospheric cavity of the planet at r = rin. Dust drifts towards the planet and only exists in the blue region.
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