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Detectability of gravitational atoms in black hole binaries with the Einstein Telescope

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arxiv 2503.23419 v3 pith:6VGYU2E2 submitted 2025-03-30 gr-qc astro-ph.HE

classification gr-qcastro-ph.HE
keywords gravitationaldetectabilityatomsbinariesbinaryblackbosonicclouds
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Rotating black holes can amplify ultralight bosonic fields through superradiance, forming macroscopic clouds known as gravitational atoms. When the cloud forms around one of the components of a binary system, it can undergo a series of distinctive interactions, comprising both secular effects, such as dynamical friction or accretion, and resonant behaviour. These processes are expected to leave a distinctive signature on the gravitational waveform emitted by the binary, whose detectability we investigate in this paper. To do so, we implement a numerical code that integrates these effects, computed within a Newtonian approximation, for intermediate-to-high mass-ratio binaries on circular equatorial orbits. Realistic waveforms incorporating these environmental influences are generated and analyzed using the Fisher matrix formalism to evaluate the detectability of bosonic clouds with current and next-generation ground-based gravitational wave observatories. Our results demonstrate the potential for gravitational wave astronomy to probe the existence and properties of ultralight bosons.

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Cited by 4 Pith papers

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

  1. Perturbing Gravitational Atoms: Negative Love, Resonant Tides and Shifted Resonances

    gr-qc 2026-07 accept novelty 7.0 of 10

    Spinning gravitational atoms have negative static Love numbers enhanced by O(10²–10³) over non-spinning clouds, with internal perturbations shifting binary resonances.

  2. Trails of clouds in binary black holes

    gr-qc 2025-12 conditional novelty 7.0 of 10

    Boson clouds around binary black holes generically deplete through orbital resonances, driving eccentricity and spin-orbit tilt toward fixed points—including off-equatorial ones—leaving observable gravitational-wave trails.

  3. Relativistic Tidal Transitions of Saturated Kerr Boson Clouds

    astro-ph.GA 2026-07 conditional novelty 6.0 of 10

    Relativistic Kerr wavefunctions change tidal transition matrix elements of saturated boson clouds by up to 21.7% relative to the hydrogenic approximation, with the radial profile responsible for ~80% of the change.

  4. Finite Coherence in Gravitational Waves from Tidally Excited Axion Clouds

    gr-qc 2026-06 unverdicted novelty 6.0 of 10

    Gravitational-wave radiation from tidally driven Bohr crossings of black-hole axion clouds is controlled by outgoing two-level coherence, finite only for intermediate Landau-Zener sweep rates.

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