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Volume 331 - Frontier Research in Astrophysics – III (FRAPWS2018) - High Energy Astrophsyics
The maximum spin of supermassive black holes and its impact on accretion disk oscillations - the case of the Galactic Center BH
B. Aschenbach
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The frequency-mass relations of QPO black holes are explained by a double resonance of epicyclic frequencies, which are 13:1 for the orbital/radial mode combination and 3:1 for the orbital/polar mode combination at one orbit radius. The associated spin is a = 0.99622. It is discussed that this value of the spin defines the final physical state of black holes.
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