3 papers
gr-qc2026
Quasinormal modes and their excitation beyond general relativity. II: isospectrality loss in gravitational waveforms
Hector O. Silva, Giovanni Tambalo, Kostas Glampedakis +1
We continue our series of papers where we study the quasinormal modes, and their excitation, of black holes in the simplest beyond general relativity model in which first-principle…
gr-qc2024
To the Problem of Cosmic Expansion in Massive Gravity
Lavinia Heisenberg, Alessandro Longo, Giovanni Tambalo +1
We consider evolving, spatially flat isotropic and homogeneous (FLRW) cosmologies in ghost-free (dRGT) massive gravity. In this theory, no dynamical flat FLRW background exists if…
gr-qc2024
GLoW: novel methods for wave-optics phenomena in gravitational lensing
Hector Villarrubia-Rojo, Stefano Savastano, Miguel Zumalacárregui +4
Wave-optics phenomena in gravitational lensing occur when the signal's wavelength is commensurate to the gravitational radius of the lens. Although potentially detectable in lensed…