Recent studies have shown that quasinormal modes suffer from spectral instabilities, a frailty
of black holes that leads to disproportional migration of their spectra in the complex plane …

It has been shown recently that the strong cosmic censorship conjecture is violated by near-
extremal Reissner–Nordström–de Sitter black holes. We investigate whether the introduction …

The fate of strong cosmic censorship is ultimately linked to the extendibility of perturbation
across the Cauchy Horizon and known to be violated in the near extremal region of a …

A bstract We establish a no inner-horizon theorem for black holes with charged scalar hairs.
Considering a general gravitational theory with a charged scalar field, we prove that there …

Hod's proposal claims that the least damped quasinormal mode of a black hole must have
the imaginary part smaller than half of the surface gravity at the event horizon. The Strong …

It was recently shown that Strong Cosmic Censorship might be violated for near-extremally-
charged black holes in 4-dimensional de Sitter space under scalar perturbations. Here, we …

It was recently shown that the Strong Cosmic Censorship conjecture might be violated for
near-extremally-charged black holes in de Sitter space. Here, we extend our study to …

The extendibility of spacetime and the existence of weak solutions to the Einstein field
equations beyond Cauchy horizons is a crucial ingredient to examine the limits of general …

Black holes typically inhabit highly dynamical galactic environments and are frequently
permeated by accretion media. The inevitable scattering of scalar, electromagnetic, and …

A satisfactory formulation of the laws of physics entails that the future evolution of a physical
system should be determined from appropriate initial conditions. The existence of Cauchy …