Left panels: dimensionless particle number density, η, as a functionof x, for three values of ξ. The bottom panel corresponds to the critical value ξc. Right panels: dimensionless energies per particle for the same values of ξ shown in left panels (gravitational energy due to matter, νM; total gravitational energy, νM + νΛ; single-particle energy, ϵ), as a functionof the dimensionless distance x. The distances x1, x0 and x2 for ξc are marked in the bottom right panel.
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