Components of the particle relative velocity Δvpp at 100 AU as a function of particle radius a for three values of the turbulence parameter α = 10-4 (top panel), 10-3 (middle panel), and 10-2 (bottom panel). The velocity components that depend on α are shown by the solid curves. The stopping time ratio of ϵ = 0.5 is assumed for Δvr, Δvφ, Δvz, and Δvt.
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