For nonlinear electrodynamics with finite point-charge self-energy and strong energy condition, weakly charged black holes have Schwarzschild-like causal structure with no Cauchy horizon.
On static and rotating decoupled black holes without inner horizons
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abstract
Through gravitational decoupling using the extended minimal geometric deformation, a new family of static and rotating ``hairy'' black holes is provided. The background of these models is a generic Schwarzschild metric containing as special cases, the Schwarzschild, Schwarzschild-dS, Reissner-Nordstrom and Reissner-Nordstrom-dS black holes. Assuming the Kerr-Schild condition and a general equation of state, the unknown matter sector is solved given rise to black hole space-times without a Cauchy horizon, transforming the original time-like singularity of the Reissner-Nordstrom and Reissner-Nordstrom-dS black holes into a space-like singularity. This fact is preserved for the rotating version of all these solutions.
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gr-qc 1years
2025 1verdicts
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Excising Cauchy Horizons with Nonlinear Electrodynamics
For nonlinear electrodynamics with finite point-charge self-energy and strong energy condition, weakly charged black holes have Schwarzschild-like causal structure with no Cauchy horizon.