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Relativistic drag forces on black holes from scalar dark matter clouds of all sizes

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arxiv 2305.10492 v2 pith:C6FWFA4A submitted 2023-05-17 gr-qc astro-ph.COhep-th

Dina Traykova , Rodrigo Vicente , Katy Clough , Thomas Helfer , Emanuele Berti , Pedro G. Ferreira , Lam Hui This is my paper · ORCID
classification gr-qcastro-ph.COhep-th
keywords scalaraccretionblackdarkmattersmallcloudsconfirm
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We use numerical simulations of scalar field dark matter evolving on a moving black hole background to confirm the regime of validity of (semi-)analytic expressions derived from first principles for both dynamical friction and momentum accretion in the relativistic regime. We cover both small and large clouds (relative to the de Broglie wavelength of the scalars), and light and heavy particle masses (relative to the BH size). In the case of a small dark matter cloud, the effect of accretion is a non-negligible contribution to the total force on the black hole, even for small scalar masses. We confirm that this momentum accretion transitions between two regimes (wave- and particle-like) and we identify the mass of the scalar at which the transition between regimes occurs.

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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. Environmental effects in extreme mass ratio inspirals: perturbations to the environment in Kerr

    gr-qc 2025-01 conditional novelty 7.0 of 10

    A perturbative calculation shows that a secondary body in Kerr spacetime creates a wake in a superradiant scalar cloud, with energy fluxes that differ from Schwarzschild predictions by tens of percent.

  2. Scattering of wave dark matter by supermassive black holes

    gr-qc 2024-12 conditional novelty 7.0 of 10

    A first-principles scattering calculation explains the co-rotating wave dark matter profile around supermassive black hole binaries and predicts resonant power peaks that could imprint on the pulsar timing array spectrum.

  3. Tidal Love numbers and quasi-normal modes of the Schwarzschild-Hernquist black hole

    gr-qc 2024-12 conditional novelty 6.0 of 10

    For a Schwarzschild black hole in a relativistic Hernquist dark matter halo, quasinormal-mode frequency shifts scale as (MDM/rs)^(3/2) rather than linearly, while tidal Love numbers are small and sensitive to the choi...

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