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Deviations from Kerr: Polar critical curves and photon rings in a class of separable spacetimes

Yan, Hao-Peng et al.
arXiv (All) · Papers
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general-relativity-and-quantum-cosmology
Black-hole critical curves and photon rings provide complementary probes of strong-field geometry, motivating a unified analytic description of these observables beyond Kerr and a direct comparison with the Kerr predictions. We develop such a description for polar observers in a radial class of stat
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