Fig. 2.
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Formation efficiency of S–BH in all CMC models with Z = 2 × 10−4 (bullets) and all S–BH formed in the N-body models of Rastello et al. (2023) for solar metallicity (square). The dashed lines show the maximum η, corresponding to all BHs in the cluster being in a S–BH, and the minimum η, corresponding to clusters with one BH. The dotted lines correspond to constant numbers of S–BH.
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