Did you know?
"Even if a black hole can pull matter faster than the Eddington limit, that increased accretion should produce powerful winds and outflows that drives materials away, choking off further growth. In other words if episodes of super-Eddington accretion do occur they are presumably in duration, setting yet another limit on how fast black hole can grow.
Because of these natural limits, astronomers find it difficult to explain how a black hole starting off with 100 to 200 solar masses can accrete enough material in only a few hundred million years to grow into the billion-solar-mass behemoth powering the quasars J1342 and J1007. For that, we need to seed black holes with much higher intial masses. But how are they born?"
Astronomy Magazine March 2021 "How to Grow a Giant Black Hole" pp. 16-23
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