3 papers
gr-qc2026
Beyond black hole spectroscopy: Quasinormal mode contamination by massless scalars
Miguel Yulo Asuncion, Giovanni D'Addario, Thomas P. Sotiriou
Testing General Relativity (GR) with black hole ringdowns has conventionally focused on attempting to detect shifts away from the quasinormal mode (QNM) frequencies of the Kerr met…
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…
gr-qc2024
Ringdowns for black holes with scalar hair: the large mass case
Giovanni D'Addario, Antonio Padilla, Paul M. Saffin +2
Deviations from General Relativity can alter the quasi-normal mode (QNM) ringdown of perturbed black holes. It is known that a shift-symmetric (hence massless) scalar can only intr…