Papers › Supermassive black holes from runaway mergers and accretion in nuclear star clusters

Supermassive black holes from runaway mergers and accretion in nuclear star clusters

17 Apr 2024arXiv:2404.11676links table onlyarchive 2025-07-28

Konstantinos Kritos, Emanuele Berti, Joseph Silk

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Rapid formation of supermassive black holes occurs in dense nuclear star clusters that are initially gas-dominated. Stellar-mass black hole remnants of the most massive cluster sink into the core, where a massive runaway black hole forms as a consequence of combined effects of repeated mergers and Eddington-limited gas accretion. The associated gravitational wave signals of high-redshift extreme mass-ratio inspirals are a unique signature of the nuclear star cluster scenario.

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