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Black holes on the brane
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We consider exact solutions for static black holes localized on a three-brane in five-dimensional gravity in the Randall-Sundrum scenario. We show that the Reissner-Nordstrom metric is an exact solution of the effective Einstein equations on the brane, re-interpreted as a black hole without electric charge, but with instead a tidal 'charge' arising via gravitational effects from the fifth dimension. The tidal correction to the Schwarzschild potential is negative, which is impossible in general relativity, and in this case only one horizon is admitted, located outside the Schwarzschild horizon. The solution satisfies a closed system of equations on the brane, and describes the strong-gravity regime. Current observations do not strongly constrain the tidal charge, and significant tidal corrections could in principle arise in the strong-gravity regime and for primordial black holes.
Forward citations
Cited by 8 Pith papers
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Hidden-sector accretion and warped black-string seeds for high-redshift supermassive black holes
A warped 5D geometry with hidden-sector accretion produces growing Schwarzschild/Vaidya black-hole seeds on our brane via a common horizon intersection.
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Dark matter environments and safeguards for spacetime inference from horizon scale interferometry
Using public 2017 M87* closure data, a frozen Kerr source fails an absolute adequacy test and the differential tidal-charge response fails numerical convergence, so no posterior or bound is reported.
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Braneworld Neutron Stars: Constraining Brane Tension with Observational Data
Using six neutron star equations of state, braneworld gravity can support the 2.5 to 2.67 solar mass object seen in GW190814 and gives a lower bound on brane tension near 2×10^37 dyne/cm^2.
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Radiative Back-Reaction on Charged Particle Motion in the Dipole Magnetosphere of Neutron Stars
Radiative back-reaction makes charged particles under an attractive Lorentz force fall onto a magnetized neutron star, while under a repulsive force they either widen their orbits or fall, depending on the starting latitude.
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Investigating the interplay of the braneworld gravity and the plasma environment on the black hole shadow
Negative tidal charge enlarges the shadow of rotating braneworld black holes while inhomogeneous plasma shrinks it and homogeneous plasma enlarges it; EHT data limits q to roughly -1.15 to 0.45 for M87* in the low-den...
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Wormholes from beyond
Using the Nakas-Kanti top-down approach, the author embeds the Morris-Thorne and Molina-Neves wormholes in a regular five-dimensional anti-de Sitter bulk, so the wormhole on the brane is supported entirely by bulk fields.
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Images of Braneworld black holes with radiatively inefficient accretion flows
GRRT simulations of CFM braneworld black holes show nonmonotonic tidal-parameter effects on image morphology with normalized mismatches of order 10^3, indicating identification remains difficult even with ngEHT and BHEX.
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Astrophysical environment around a black hole in the braneworld and its optical signatures
Braneworld quadratic and nonlocal corrections weaken gravity in anisotropic Einstein-cluster environments around black holes, blocking horizon formation and shifting Einstein-ring and shadow radii in ways that may con...
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