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arXiv · 1203.4681

Self-organized criticality in boson clouds around black holes

Gabriela-Raluca Mocanu·Daniel Grumiller
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Abstract

Boson clouds around black holes exhibit interesting physical phenomena through the Penrose process of superradiance, leading to black hole spin-down. Axionic clouds are of particular interest, since the axion Compton wavelength could be comparable to the Schwarzschild radius, leading to the formation of "gravitational atoms" with a black hole nucleus. These clouds collapse under certain conditions, leading to a "Bosenova". We model the dynamics of such unstable boson clouds by a simple cellular automaton and show that it exhibits self-organized criticality. Our results suggest that the evolution through the black hole Regge plane is due to self-organized criticality.

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Gabriela-Raluca Mocanu, Daniel Grumiller. 2012-03-21. Self-organized criticality in boson clouds around black holes. https://doi.org/10.1103/physrevd.85.105022

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