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Fig. 3.

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Run A0.5gam1.25M0.1 (α = 0.5, Γ = 1.25, ℳ = 0.1) at five time steps (3 before and 2 after the sink formation). Full lines: 3D simulations. Dashed lines: 1D simulations. The time steps were adjusted using the value of the central density or the mass of the sink particle. As can be seen, the agreement is generally quite good for the density and radial velocity (except in the inner part of the cloud after sink formation). The agreement with the transverse velocity component is also good, though less tight than it is for n and Vr. For the radial velocity fluctuation, vr, the agreement remains comparable to that for vt, except at late time in the inner part of the cloud and generally outside the cloud (r >  0.1 pc.)

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