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Fig. 2

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Dust density distribution normalized to the maximum on a plane perpendicular to the disk midplane. For better graphical representation, the fourth root of the function is plotted. Upper plot: disk model with the inclusion of dust settling. Large grains dominate the density in the midplane, while small grains are present everywhere in the disk. Lower plot: well-mixed model in which the grain size distribution is homogeneous at all disk radii.

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