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Tidal effects and disruption in superradiant clouds: a numerical investigation

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arxiv 2001.01729 v3 pith:JWWWZA7Q submitted 2020-01-06 gr-qc hep-th

Vitor Cardoso , Francisco Duque , Taishi Ikeda This is my paper
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keywords tidalblackfieldssuperradiantaroundcompanioncygnushole
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abstract

The existence of light, fundamental bosonic fields is an attractive possibility that can be tested via black hole observations. We study the effect of a tidal field -- caused by a companion star or black hole -- on the evolution of superradiant scalar-field states around spinning black holes. For small tidal fields, the superradiant "cloud" puffs up by transitioning to excited states and acquires a new spatial distribution through transitions to higher multipoles, establishing new equilibrium configurations.For large tidal fields the scalar condensates are disrupted; we determine numerically the critical tidal moments for this to happen and find good agreement with Newtonian estimates. We show that the impact of tides can be relevant for known black-hole systems such as the one at the center of our galaxy or the Cygnus X-1 system. The companion of Cygnus X-1, for example, will disrupt possible scalar structures around the BH for gravitational couplings as large as $M\mu\sim 2\times 10^{-3}$.

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Cited by 2 Pith papers

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

  1. 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.

  2. Probing Fundamental Constant Oscillation in the Galactic Center with S-Star Spectroscopy

    hep-ph 2025-07 conditional novelty 6.0 of 10

    Time-resolved spectroscopy of S-stars around Sgr A* can probe oscillations of the fine-structure constant induced by superradiant axion clouds or dark-matter soliton cores, with future instruments potentially reaching...

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