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Probing the horizon of black holes with gravitational waves

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arxiv 2310.07368 v1 pith:TSXKPTB2 submitted 2023-10-11 gr-qc astro-ph.HEhep-phhep-th

Probing the horizon of black holes with gravitational waves

classification gr-qc astro-ph.HEhep-phhep-th
keywords blackcompactobjectsgravitational-wavedarkgravitationalholeholes
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Gravitational waves open the possibility to investigate the nature of compact objects and probe the horizons of black holes. Some models of modified gravity predict the presence of horizonless and singularity-free compact objects. Such dark compact objects would emit a gravitational-wave signal which differs from the standard black hole scenario. In this chapter, we overview the phenomenology of dark compact objects by analysing their characteristic frequencies in the ringdown and the emission of gravitational-wave echoes in the postmerger signal. We show that future gravitational-wave detectors will allow us to perform model-independent tests of the black hole paradigm.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Novel ringdown tests of general relativity with black hole greybody factors

    gr-qc 2026-04 unverdicted novelty 7.0

    GreyRing model based on greybody factors reproduces numerical relativity ringdown signals with mismatches of order 10^{-6} and enables a new post-merger consistency test of general relativity applied to GW250114.

  2. Excitation factors for horizonless compact objects: long-lived modes, echoes, and greybody factors

    gr-qc 2025-11 unverdicted novelty 6.0

    Excitation factors of long-lived quasinormal modes in horizonless compact objects scale with their small imaginary frequency, suppressing early contributions and producing a hierarchy where prompt ringdown uses ordina...

  3. Greybody factors, reflectionless scattering modes, and echoes of ultracompact horizonless objects

    gr-qc 2025-01 unverdicted novelty 5.0

    High-frequency quasi-reflectionless scattering modes in the greybody factors of ultracompact horizonless objects are responsible for echoes in the time-domain response.