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Fig. 4.

image

Top: simulated density map of the particles around the origin for D → ∞ (the particles come from the right). The inner cavity of radius ρcav = W0(exp[−1]) is visible, as well as a caustic (line of overdensity). Bottom: some trajectories evenly sampled along ln(ρC) are shown. The cavity is represented by the white disc.

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