Fig. 8: Milky Way GCs structural properties.
From: Dissecting the properties of neutron star–black hole mergers originating in dense star clusters

a Clusters half-mass radius. Distribution of half-mass radius (RGC) in parsecs for Milky Way globular clusters (GC, shaded steps) and nuclear clusters observed in the local Universe (NC, red steps). The dotted line represents the best-fit Gaussian distribution. b Clusters velocity dispersion. Distribution of clusters velocity dispersion (σ) in kilometer per second for the same sample of clusters shown in a. c Clusters relaxation time. Distribution of clusters relaxation time in yr for the same sample of clusters shown in a.