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Fig. 2

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Dust size a (left ordinate) and Stokes number St (right ordinate) as functions of the radius r. Conversion relations between dust size and Stokes number in the mid-plane of our protoplanetary disk model (Eqs. (12)(13)) are shown for the two dust sizes (orange lines) and the two Stokes numbers (blue lines) that we simulated, assuming an isothermal equation of state.

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