The paper derives Bayesian constraints on magnetic field strength and dipole coupling in magnetized Schwarzschild black holes by fitting QPO frequencies from stellar-mass to supermassive systems within the relativistic precession model.
The orbital resonance model for twin peak kHz QPOs
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abstract
Many Galactic black hole and neutron star sources in low X-ray mass binaries show QPOs (quasi periodic oscillations) in their observed X-ray fluxes, i.e. peaks in the Fourier variability power spectra. Pairs of twin peaks are observed, and in black-hole systems their frequencies (upp), (down) are in rational ratios. For example, in all four microquasars with twin peaks observed, (upp):(down) = 3:2. The rational ratios have been postulated in a model that explained twin peak QPOs as a non-linear resonance between modes of accretion disk oscillations. For those microquasars where the mass of the X-ray source is known, we determine the black-hole spin, following from the observed QPO frequencies within various models of resonance.
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gr-qc 1years
2026 1verdicts
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QPO-Based Bayesian Constraints on Charged Particle Dynamics Around Magnetized Schwarzschild Black Holes
The paper derives Bayesian constraints on magnetic field strength and dipole coupling in magnetized Schwarzschild black holes by fitting QPO frequencies from stellar-mass to supermassive systems within the relativistic precession model.