Journal
PHYSICAL REVIEW D
Volume 81, Issue 10, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.81.104004
Keywords
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Funding
- World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan
- Ministry of Education, Culture, Sports, Science and Technology, Japan [18740144, 21740190]
- Grants-in-Aid for Scientific Research [18740144, 22740147] Funding Source: KAKEN
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In this paper we continue our study on the accretion process onto superspinning Kerr objects with no event horizon (super-spinars). We discuss the counterpart of the Bondi accretion onto black holes. We first report the results of our numerical simulations. We found a quasi-steady-state configuration for any choice of the parameters of our model. The most interesting feature is the presence of hot outflows. Unlike jets and outflows produced around black holes, which are thought to be powered by magnetic fields and emitted from the poles, here the outflows are produced by the repulsive gravitational force at a small distance from the super-spinar and are ejected around the equatorial plane. In some circumstances, the amount of matter in the outflow is considerable, which can indeed significantly reduce the gas mass accretion rate. Finally, we discuss a possible scenario of the accretion process in more realistic situations, which cannot be simulated by our code.
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