Simulations of 47 Tuc show hierarchical mergers and occasional surviving primordial seeds above the pair-instability gap produce retained black holes of 45-1100 solar masses with distinct spin distributions, favoring a dark-remnant population over a single massive IMBH while remaining consistent the
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A coupled galaxy-cluster model shows that Milky Way globular clusters, many from satellite galaxies, form dynamically interacting black hole binaries whose merger rates increase with redshift up to z=5.
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Repopulating the pair-instability mass gap without sustained growth to massive IMBHs: the case of 47\,Tuc
Simulations of 47 Tuc show hierarchical mergers and occasional surviving primordial seeds above the pair-instability gap produce retained black holes of 45-1100 solar masses with distinct spin distributions, favoring a dark-remnant population over a single massive IMBH while remaining consistent the
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Milky Way Globular Clusters: Nurseries for Dynamically-Formed Binary Black Holes
A coupled galaxy-cluster model shows that Milky Way globular clusters, many from satellite galaxies, form dynamically interacting black hole binaries whose merger rates increase with redshift up to z=5.