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- W4313504918 abstract "Nuclear star clusters, which fragment into metal-poor stars in situ at the centers of protogalaxies, provide ideal environments for the formation of intermediate-mass black holes with masses ${10}^{3}--{10}^{6}{M}_{ensuremath{bigodot}}$. We utilize the semianalytic model implemented in rapster, a public rapid cluster evolution code. We implement simple recipes for stellar collisions and gas accretion/expulsion into the code and identify the regimes where each channel contributes to the dynamical formation of intermediate-mass black holes via repeated mergers of stellar black hole seeds. We find that intermediate-mass black hole formation in gas-rich environments is almost inevitable if the initial mean density of the nuclear cluster is $>{10}^{8}{M}_{ensuremath{bigodot}}text{ }text{ }{mathrm{pc}}^{ensuremath{-}3}$. A million solar mass black hole can form within 100 Myr in the heaviest ($>{10}^{7}{M}_{ensuremath{bigodot}}$) and most compact ($<0.5text{ }text{ }mathrm{pc}$) nuclear clusters. We demonstrate that by today these resemble the observed range of nuclear clusters in dwarf galaxies and that there are potential gravitational-wave signatures of the massive black hole formation process." @default.
- W4313504918 created "2023-01-06" @default.
- W4313504918 creator A5008250523 @default.
- W4313504918 creator A5080018935 @default.
- W4313504918 creator A5091293746 @default.
- W4313504918 date "2023-10-11" @default.
- W4313504918 modified "2023-10-18" @default.
- W4313504918 title "Massive black hole assembly in nuclear star clusters" @default.
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