Derives a factorized leading term for the strong deflection angle near degenerate photon spheres using local expansion of the effective potential and Weyl tensor measures.
Deflection Angle in the Strong Deflection Limit and Quasinormal Modes in Stationary Axisymmetric Spacetimes
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Derives perturbative formulas for quasinormal-mode frequency shifts in hairy black holes expressed directly in terms of anisotropic-fluid equation-of-state parameters via the eikonal correspondence.
Extends strong-deflection-limit analysis to power-divergent lensing by marginally unstable photon spheres in general static spherically symmetric asymptotically flat spacetimes and tests it on Reissner-Nordström and Hayward metrics.
citing papers explorer
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Strong-deflection expansion of the deflection angle near a degenerate photon sphere
Derives a factorized leading term for the strong deflection angle near degenerate photon spheres using local expansion of the effective potential and Weyl tensor measures.
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Ringdown waves from hairy black holes
Derives perturbative formulas for quasinormal-mode frequency shifts in hairy black holes expressed directly in terms of anisotropic-fluid equation-of-state parameters via the eikonal correspondence.
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Gravitational lensing inside and outside of a marginally unstable photon sphere in a general, static, spherically symmetric, and asymptotically-flat spacetime in strong deflection limits
Extends strong-deflection-limit analysis to power-divergent lensing by marginally unstable photon spheres in general static spherically symmetric asymptotically flat spacetimes and tests it on Reissner-Nordström and Hayward metrics.