2 papers
gr-qc2026
Schrödinger perturbation theory for black hole quasinormal modes
Jacopo Lestingi, Laura Sberna, Stephen R. Green
Deviations from vacuum general relativity (such as modified theories or the presence of an environment) produce small shifts in black hole quasinormal mode (QNM) spectra. These eff…
gr-qc2025
Frequency contamination from new fundamental fields in black hole ringdowns
Jacopo Lestingi, Giovanni D'Addario, Thomas P. Sotiriou
We revisit the modelling of black hole ringdown beyond General Relativity (GR), emphasizing the limitations of approaches that rely solely on shifted quasinormal mode (QNM) frequen…