Frequency contamination from new fundamental fields in black hole ringdowns

2025/05/23 by Lestingi, Jacopo, D'Addario, Giovanni, Sotiriou, Thomas P. · 3 citations
#FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Astrophysical Phenomena (astro-ph.HE) #High Energy Physics - Theory (hep-th)

paper · doi:10.48550/arxiv.2505.18261

Abstract

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) frequencies. Starting from modified Teukolsky equations in such scenarios, we classify the distinct types of deviations that can arise -- those shifting QNM frequencies, and those introducing additional frequencies associated with extra fields. We then construct the most general ansatz for metric perturbations in this context and discuss its implications for QNM modelling and theory-agnostic tests of GR using gravitational wave data.

Citations

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Cited by

• Quasi-normal modes ratios as agnostic test of general relativity
• Constraining the Swift Memory Burden Effect with GW250114-like Events
• Eikonal quasinormal modes of highly-spinning black holes in higher-curvature gravity: a window into extremality

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