Kavli Affiliate: Ke Wang
| First 5 Authors: Xiao-Xiong Zeng, Xiao-Xiong Zeng, , ,
| Summary:
Recently, a class of exact solutions describing rotating black holes immersed
in a uniform magnetic field has been proposed, and various properties of such
black holes remain unclear. This paper aims to explore how to extract energy
based on the magnetic reconnection mechanism in both the circular orbit region
and the plunging region. After introducing the properties of this spacetime, we
analyze physical quantities such as the size of the ergoregion, the event
horizon, and the boundaries of the ergosphere. We then analyze the magnetic
reconnection process within circular orbits. We plot energy extraction
parameter diagrams, and analyze the power and efficiency of energy extraction.
The results show that the magnetic field impedes energy extraction. Comparing
with Kerr black holes and Kerr-Melvin black holes, we find that this black
hole’s energy extraction capability is stronger than that of the Kerr-Melvin
black hole but weaker than that of the Kerr black hole. Furthermore, we study
magnetic reconnection and energy extraction in the plunging region of this
black hole. The results indicate that the magnetic field still impedes energy
extraction. The black hole’s energy extraction capability in this region also
remains weaker than that of a Kerr black hole but stronger than that of a
Kerr-Melvin black hole. Comparing the plunging region with the circular orbit
region, we find that the energy extraction power in the plunging region is
consistently stronger than in the circular orbit region.
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