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- W4387389768 abstract "Dense stellar clusters are expected to house the ideal conditions for binary black hole (BBH) formation, both through binary stellar evolution and through dynamical encounters. We use theoretical arguments as well as $N$-body simulations to make predictions for the evolution of BBHs formed through stellar evolution inside clusters from the cluster birth (which we term $textbf{primordial binaries}$), and for the sub-population of merging BBHs. We identify three key populations: (i) BBHs that form in the cluster, and merge before experiencing any $textit{strong}$ dynamical interaction; (ii) binaries that are ejected from the cluster after only one dynamical interaction; and, (iii) BBHs that experience more than one strong interaction inside the cluster. We find that populations (i) and (ii) are the dominant source of all BBH mergers formed in clusters with escape velocity $v_{mathrm{esc}}leq 30$ $mathrm{km,s^{-1}}$. At higher escape velocities, dynamics are predicted to play a major role both for the formation and subsequent evolution of BBHs. Finally, we argue that for sub-Solar metallicity clusters with $v_{mathrm{esc}}lesssim100$ $mathrm{km,s^{-1}}$, the dominant form of interaction experienced by primordial BBHs (BBHs formed from primordial binaries) within the cluster is with other BBHs. The complexity of these binary-binary interactions will complicate the future evolution of the BBH and influence the total number of mergers produced." @default.
- W4387389768 created "2023-10-06" @default.
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- W4387389768 date "2023-10-03" @default.
- W4387389768 modified "2023-10-09" @default.
- W4387389768 title "Black hole binary mergers in dense star clusters: the importance of primordial binaries" @default.
- W4387389768 doi "https://doi.org/10.48550/arxiv.2310.02376" @default.
- W4387389768 hasPublicationYear "2023" @default.
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