Kavli Affiliate: Cheng Peng
| First 5 Authors: Lang Cheng, Lang Cheng, , ,
| Summary:
We numerically construct a family of stationary, axisymmetric black hole
solutions in Einstein-Born-Infeld theory, incorporating both electric charge
and rotation. Our results indicate that when nonlinear electromagnetic effects
are weak, rotating BI black holes with fixed spin approach the extremal limit
as the electric charge increases. In contrast, strong nonlinear effects lead to
the termination of solutions at configurations corresponding to naked
singularities. We demonstrate that nonlinear electrodynamics enhances the
gyromagnetic ratio relative to that of Kerr-Newman (KN) black holes.
Additionally, we analyze the Innermost Stable Circular Orbits (ISCOs) and find
that both prograde and retrograde ISCO radii are consistently smaller than
those found in KN black holes.
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