The gravitational waves emitted (some time) after two black holes merge are well described
by the theory of linear perturbations on a spacetime characterized by the mass and spin of …

We present new, fully nonlinear numerical solutions to the static, spherically symmetric
Einstein-Klein-Gordon system for a collection of an arbitrary odd number $ N $ of complex …

The dynamics of perturbed nonrotating black holes (BHs) can be described in terms of
master equations of the wave type with a potential. In the frequency domain, the master …

We prove in this paper that the Schwarzschild family of black holes are linearly stable as a
family of solutions to the system of equations that result from expressing the Einstein vacuum …

This paper discusses the relativistic kinetic theory for a simple collisionless gas from a
geometric perspective. We start by reviewing the rich geometrical structure of the tangent …

In this work we investigate the presence of integrable hidden structures in the dynamics of
perturbed nonrotating black holes (BHs). This can also be considered as a first step in a …

We explore the duality invariance of the Maxwell and linearized Einstein–Hilbert actions on
a non-rotating black hole background. On-shell, these symmetries are electric–magnetic …

The interaction between waves and matter in the Universe is a fundamental but very
challenging problem, since one needs to consistently solve the Einstein-matter equations in …

In the class of vacuum Petrov type D spacetimes with cosmological constant, which includes
the Kerr-(A) dS black hole as a particular case, we find a set of four-dimensional operators …

By the use of the gauge-invariant variables proposed by Kodama and Ishibashi, we obtain
the most general perturbation equations in the (m+ n)-dimensional spacetime with a warped …