Ringdown frequency and damping shifts of Schwarzschild/Kerr black holes are expressed through the density and anisotropic pressures of the surrounding matter, giving a perturbative map from hairy-black-hole models to quasinormal-mode deviations.
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A Kaluza-Klein boost on Kerr-Taub-NUT enlarges the physical ergoregion volume without altering horizon radius, entropy, or temperature, while adding dyonic work terms to the first law.
Under fixed-background GRMHD and polarized radiative transfer, modified Kerr-Hayward black holes produce EHT fluid and image observables functionally indistinguishable from Kerr.
For a rotating black hole in a Dehnen dark matter halo, the scalar quasibound spectrum is the Kerr hydrogenic spectrum with a halo-shifted effective mass, and the superradiant window narrows through a halo-modified horizon quantity.
Parameter scans of a hand-set effective model show that adding dark matter around a rotating black hole slows the intermediate-axis flip frequency of a coherent triaxial structure relative to Kerr.
EHT angular diameter data yield upper bounds on the holonomy correction b (e.g., b ≤ 0.1319M at a=0 for M87*) showing nonzero b remains consistent with observations for RHCBH spacetimes.
Plebanski's chiral 2-form formulation of GR reveals additional structure in Einstein's equations and supplies new analytical and numerical tools.
Increasing the asymptotic safety parameter and spin shrinks the shadow size while increasing its distortion for a rotating Bardeen black hole, with monopole charge shaping the profile and energy emission rates also computed.
Constraints on deviations from Kerr black hole metrics are derived from binary black hole inspiral waveforms modeled with effective one-body methods and analyzed via the parameterized post-Einsteinian framework.
citing papers explorer
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Ringdown waves from hairy black holes
Ringdown frequency and damping shifts of Schwarzschild/Kerr black holes are expressed through the density and anisotropic pressures of the surrounding matter, giving a perturbative map from hairy-black-hole models to quasinormal-mode deviations.
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Ergosphere Geometry and Thermodynamic Properties of Boosted Kerr-Taub-NUT Solutions in Kaluza-Klein Theory
A Kaluza-Klein boost on Kerr-Taub-NUT enlarges the physical ergoregion volume without altering horizon radius, entropy, or temperature, while adding dyonic work terms to the first law.
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Observational distinguishability of the Kerr and Kerr-Hayward metrics to EHT
Under fixed-background GRMHD and polarized radiative transfer, modified Kerr-Hayward black holes produce EHT fluid and image observables functionally indistinguishable from Kerr.
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Tuning A Rotating Black Hole Spectrum with Dark Matter Halo: Quasibound States, Scalar Cloud, Black Hole Bomb and Superradiant Scattering
For a rotating black hole in a Dehnen dark matter halo, the scalar quasibound spectrum is the Kerr hydrogenic spectrum with a halo-shifted effective mass, and the superradiant window narrows through a halo-modified horizon quantity.
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A dark-matter-sensitive orientation clock near rotating black holes
Parameter scans of a hand-set effective model show that adding dark matter around a rotating black hole slows the intermediate-axis flip frequency of a coherent triaxial structure relative to Kerr.
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Testing loop quantum gravity through EHT observations of M87* and Sgr A* using rotating holonomy-corrected black holes
EHT angular diameter data yield upper bounds on the holonomy correction b (e.g., b ≤ 0.1319M at a=0 for M87*) showing nonzero b remains consistent with observations for RHCBH spacetimes.
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General Relativity via differential forms -- explorations in Plebanski's Formalism for GR
Plebanski's chiral 2-form formulation of GR reveals additional structure in Einstein's equations and supplies new analytical and numerical tools.
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EHT-Constrained Analysis of Shadow Deformation in Quantum-Improved Rotating Non-Singular Magnetic Monopole
Increasing the asymptotic safety parameter and spin shrinks the shadow size while increasing its distortion for a rotating Bardeen black hole, with monopole charge shaping the profile and energy emission rates also computed.
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Testing black hole metrics with binary black hole inspirals
Constraints on deviations from Kerr black hole metrics are derived from binary black hole inspiral waveforms modeled with effective one-body methods and analyzed via the parameterized post-Einsteinian framework.