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Fig. 2

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Example of model results showing the variation of horizonal velocities with height above the midplane (measured in scale heights). Lines show velocities of gas (dotted line), dust without the force of radiation pressure (long-dashed line), dust with the force (solid line), and zero velocity separating inflow from outflow (horizonal short-dashed line). Model parameters used in this result are T = 10 000 K, L = 40 L, Lacc = 5 L, M = 2.5 M, q = −0.5, p = −2.25, a = 1 μm, ρgrain = 3 g/cm3, and α = 0.01. The model output is ρ0 = 2.6 × 10-9 g/cm3, acc = 1.7 × 10-7M/year, and Rin = 0.54 AU. The dusty disk is truncated at a height of zmax = 3.24Hp = 0.11Rin (the point where dust turns from inflow to outflow).

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