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Distinguishing black holes from horizonless objects through the excitation of resonances during inspiral

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arxiv 1907.01561 v4 pith:RKX5Q7JT submitted 2019-07-02 gr-qc astro-ph.HEhep-phhep-th

classification gr-qcastro-ph.HEhep-phhep-th
keywords objectscompactduringexcitationinspiralresonancesverygravitational-wave
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How well is the vacuum Kerr geometry a good description of the dark, compact objects in our universe? Precision measurements of accreting matter in the deep infrared and gravitational-wave measurements of coalescing objects are finally providing answers to this question. Here, we study the possibility of resonant excitation of the modes of the central object -- taken to be very compact but horizonless -- during an extreme-mass-ratio inspiral. We show that for very compact objects resonances are indeed excited. However, the impact of such excitation on the phase of the gravitational-wave signal is negligible, since resonances are crossed very quickly during inspiral.

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Cited by 3 Pith papers

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

  1. Gravitational waves from b-EMRIs: Doppler shift and beaming, resonant excitation, helicity oscillations and self-lensing

    gr-qc 2025-06 conditional novelty 7.0 of 10

    A first-principles Teukolsky model of a binary extreme-mass-ratio inspiral shows Doppler modulation, beaming, self-lensing, helicity-dependent scattering, and SMBH ringdown resonances in the waveform.

  2. Macroscopic backreaction of the trace anomaly on classical vacuum backgrounds

    gr-qc 2025-12 conditional novelty 6.0 of 10

    Order-reduced backreaction of the trace-anomaly RSET on Schwarzschild gives a naked singularity without compensatory terms and a wormhole throat with them.

  3. Extreme mass ratio inspirals around topological stars

    gr-qc 2025-04 conditional novelty 6.0 of 10

    A scalar charge orbiting a topological star produces fluxes that deviate from the black hole case and can dephase by up to 10^4 radians over a year, while QNM resonances are too narrow to be observable.

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