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Fig. 4

image

Spatial maps of the grown dust surface density in the inner 200 × 200 au2 box shown in model 1 at six consecutive times. The yellow arrows indicate the inward-migrating clump. The insets shows the azimuthal variations in the dust-to-gas ratio at a given radial distance from the star. The red circle in the coordinate center represents schematically the sink cell.

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