3 papers
gr-qc2026
Gravitational wave propagation in bigravity in the late universe
David Brizuela, Marco de Cesare, Araceli Soler Oficial
We carry out a detailed analytical investigation of the propagation of gravitational waves in ghost-free bimetric gravity in a late-time de Sitter epoch. In this regime, the dynami…
gr-qc2026
A bigravity model from noncommutative geometry
Marco de Cesare, Mairi Sakellariadou, Araceli Soler Oficial
Noncommutative gravity, based on a twist-deformation of the differential geometry of spacetime and a first-order formulation of the dynamics, requires additional gravitational degr…
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…