Quasinormal modes and gray-body factors for gravitational perturbations in asymptotically safe gravity

Abstract A quantum-corrected black hole model arising from gravitational collapse in the framework of asymptotically safe gravity was recently proposed in Bonanno et al. (Phys Rev Lett 132:031401, 2024). Quantum corrected spacetime strongly deviates from the Schwarzschild solution near the event horizon, quickly merging with the Schwarzschild metric in the far region. While quasinormal modes and gray-body factors have been analyzed for test fields in this background, no such analysis has yet been performed for gravitational perturbations. In this work, we study axial gravitational perturbations of these black holes by modeling the effective quantum corrections through an anisotropic fluid energy-momentum…

• UH
  Univerzita Hradec Králové