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Fig. 19

image

Flow transition mass as a function of the Mach number of the headwind of the gas (black solid line). Dashed lines correspond to the pebble transition mass with different Stokes numbers (Eq. (A.4)). Blue and green regions correspond to the flow-shear and the flow-headwind regime, respectively. Since our study does not deal with gap formation (related to high-mass planets; Sect. 4.3.3), the range of the vertical axis is set to m ≤ 3.

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