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A precise determination of angular momentum in the black hole candidate GRO J1655-40

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arxiv astro-ph/0105077 v1 pith:QUE7FDSI submitted 2001-05-04 astro-ph

Marek Artur Abramowicz , Wlodek Kluzniak This is my paper · ORCID
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abstract

We note that the recently discovered 450 Hz frequency in the X-ray flux of the black hole candidate GRO J1655-40 is in a 3:2 ratio to the previously known 300 Hz frequency of quasi-periodic oscillations (QPO) in the same source. If the origin of high frequency QPOs in black hole systems is a resonance between orbital and epicyclic motion of accreting matter, as suggested previously, the angular momentum of the black hole can be accurately determined, given its mass. We find that the dimensionless angular momentum is in the range $0.2<j<0.65$ if the mass is in the (corresponding) range of 5.5 to 7.9 solar masses.

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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. Geometric properties of slowly rotating black holes embedded in matter environments

    gr-qc 2026-02 conditional novelty 6.0 of 10

    The rotation of a surrounding dark-matter halo shifts the light ring, ISCO, epicyclic frequencies, and resonance locations of a slowly spinning black hole in a way that depends on the halo's angular velocity.

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

    gr-qc 2026-01 unverdicted novelty 6.0 of 10

    Increasing tidal deformation around a black hole drives bound geodesics through weak chaos, plunging, unbinding, and eventual depletion of all bound motion, with semi-analytic critical amplitudes for each transition.

  3. Orbital Motion in Spacetimes Influenced by the Presence of Scalar and Electromagnetic Fields

    gr-qc 2025-01 conditional novelty 6.0 of 10

    Strong scalar fields around naked singularities can create stable circular orbits, and charged scalar-field spacetimes can host both stable and unstable photon orbits.

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