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Fig. 5


Black dashed histogram represents the distribution of the velocity dispersions obtained from Eq. (1) for 10 000 realizations, when errors on Mdyn and rhm, and the uncertainty on the η parameter are taken into account. The corresponding distribution needed for the cluster to be unbound is shown as a blue histogram. The distribution of the intrinsic radial velocity dispersion for L1688 is shown as a red dashed profile.

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