Values of S0 as a function of grain size s and initial position r0 for a disc of mass Mdisc = 0.01 M⊙ extending from rin = 10-2 AU to rout = 103 AU, with grains of intrinsic density ρd = 1000 kg m-3 and η0 = 10-2, for p = 0 and (top) and and (bottom). The thick line shows the limit between grains that are accreted onto the star (tin < tdisc) and those that survive in the disc (tin > tdisc), i.e. the survival limit, in the Epstein regime.
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