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This research utilizes advanced cosmological radiation-hydrodynamic simulations to demonstrate how black hole "seeds" can directly form with masses up to 10⁶ solar masses, bypassing traditional stellar evolution pathways. By modeling early universe conditions where rapid gas inflow creates massive unstable stars, the study provides a mechanism for these seeds to grow into the supermassive black holes observed by the James Webb Space Telescope. The findings resolve discrepancies between theoretical limits and observational data regarding the abundance of overmassive black holes in the early cosmos.

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Simulations show black holes exceeding expectations grew to 10⁶ solar masses

Quantum ZeitgeistSeptember 16, 20266 min read

Recent cosmological radiation-hydrodynamic simulations reveal black holes growing to 10⁶ solar masses, exceeding prior theoretical expectations.

Simulations reveal black hole "seeds" forming with masses reaching 10⁶ solar masses, a size exceeding previous theoretical expectations by an order of magnitude. The work unifies these heavy seeds with previously mysterious little red dots, identifying the latter as a short-lived, obscured phase of black hole formation. Sustained, super-Eddington accretion then allows these seeds to rapidly grow to approximately 3 × 10⁷ solar masses by redshift z ≃ 8, offering a cosmological explanation for the unexpectedly abundant population of overmassive black holes detected by the James Webb Space Telescope. These simulations reveal a pathway for these substantial seeds to emerge directly from collapsing gas clouds, bypassing the need for prolonged…

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