3 papers
gr-qc2025
Dynamical theory for spherical black holes in modified gravity
Asier Alonso-Bardaji, David Brizuela
We provide a general algorithm to construct a Hamiltonian, such that its dynamical flow covariantly defines any given spherically symmetric and static metric. This Hamiltonian is d…
gr-qc2025
Radiative properties of a nonsingular black hole: Hawking radiation and gray-body factor
Asier Alonso-Bardaji, David Brizuela, Marc Schneider
We study the radiative properties of a spherical and singularity-free black-hole geometry recently proposed in the literature. Contrary to the Schwarzschild spacetime, this geometr…
gr-qc2025
Dipolar perturbations of nonbidiagonal black holes in bigravity
David Brizuela, Marco de Cesare, Araceli Soler Oficial
In bimetric gravity, nonbidiagonal solutions describing a static, spherically symmetric, and asymptotically flat black hole are given by a pair of Schwarzschild geometries, one in…