Preprint
Sep 2026
Ringdown and greybody signatures of rational regular black holes in non-polynomial gravity
We study the quasinormal mode spectrum and wave-scattering properties of the four-dimensional rational regular black hole recently obtained in non-polynomial (quasi-topological) gravity. Using third-order WKB together with two independent cross-checks a Frobenius--Riccati shooting method and a time-domain evolution we...
Shohzod Jumaniyozov, J. Rayimbaev, Azam Payzullaev et al.
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