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The physics of kHz QPOs---strong gravity's coupled anharmonic oscillators

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arxiv astro-ph/0105057 v1 pith:XEDBIGEG submitted 2001-05-03 astro-ph

Wlodek Kluzniak , Marek Artur Abramowicz This is my paper · ORCID
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We explain the origin of the puzzling high frequency peaks (QPOs) in the variability power spectra of accreting neutron stars and black holes as a non-linear 1:2 or 1:3 resonance between orbital and radial epicyclic motion. These resonances are present because the gravitational field deviates strongly from a Newtonian 1/r potential. Our theory agrees with the recently reported observations of two QPOs, at 300 Hz and 450 Hz, in the black hole candidate GRO J1655-40.

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Cited by 3 Pith papers

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  1. The relativistic restricted three-body problem: geometry and motion around tidally perturbed black holes

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  2. Analytic and Numerical Constraints on QPOs in EHT and XRB Sources Using Quantum-Corrected Black Holes

    astro-ph.HE 2025-09 conditional novelty 5.0 of 10

    Quantum-corrected black hole models predict different QPO frequency evolutions, with Model-I showing an ISCO shift and QPO suppression that can be tested against X-ray binary observations.

  3. Accretion onto a Charged Black Hole in Consistent 4D Einstein-Gauss-Bonnet Gravity

    gr-qc 2024-12 conditional novelty 3.0 of 10

    For a charged black hole in consistent 4D Einstein-Gauss-Bonnet gravity, increasing the Gauss-Bonnet coupling or the charge shrinks the ISCO, lowers the infalling fluid's velocity and density near the horizon, and shi...

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