4 papers
Perturbations of Charged Black Holes with Higher-Order Interactions
Oleksandr S. Stashko, Roman A. Konoplya, Mark P. Hertzberg
We study linear gravitational perturbations and the corresponding quasinormal-mode spectra of electrically and magnetically charged black holes in the presence of higher-order corr…
Quasinormal Modes and Hawking Radiation of Black Holes with Primary Scalar Hair
Roman Konoplya, Oleksandr Stashko, Zdeněk Stuchlík
Recently, a new family of asymptotically flat black-hole solutions endowed with primary scalar hair has been discovered in beyond-Horndeski gravity. We study in detail the quasinor…
Probing the Effective Quantum Gravity via Quasinormal Modes and Shadows of Black Holes
R. A. Konoplya, O. S. Stashko
Two quantum-corrected black hole models have recently been proposed within the Hamiltonian constraints approach to quantum gravity, maintaining general covariance \cite{Zhang:2024k…
Quasinormal modes and gray-body factors of regular black holes in asymptotically safe gravity
Oleksandr Stashko
Recently, Bonanno et al. (2024) presented an explicit metric describing the exterior of a collapsing dust ball within the framework of asymptotically safe gravity. Based on this me…