Axion dark matter rethermalization in collapsing overdensities near cosmic dawn transports angular momentum outward fast enough to form black holes of 10^5 to 10^10 solar masses for QCD axions and similar particles above 10^{-16} eV/c^2.
2: Density profile at time tin, when the central part of the overdensity is at turnaround, in units where Mf = 1 and R = 1
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Supermassive black hole formation in the initial collapse of axion dark matter
Axion dark matter rethermalization in collapsing overdensities near cosmic dawn transports angular momentum outward fast enough to form black holes of 10^5 to 10^10 solar masses for QCD axions and similar particles above 10^{-16} eV/c^2.