Fig. 1

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Dust-to-gas density ratio at t = 400 T0 from the model with α = 10−4 and St0 = 10−3. Dashed curves in the upper panel denote contours for 25% of the gas scale height, and the arrow below denotes the Stokes number of dust grains in the midplane. Gas streamlines are overplotted in the lower panel, with the line color denoting the vertical gas velocity.
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