High-frequency QPOs as a problem in physics: non-linear resonance

Abstract

The presence of a kHz frequency in LMXBs has been expected from scaling laws, by analogy with the QPO phenomenon in HMXB X-ray pulsars. Interpretation of the two kHz frequencies, observed in accreting neutron stars, in terms of non-linear resonance in strong-field gravity led to the prediction of twin QPOs in black hole systems, in a definite frequency ratio (such as 2/3). The imprint of a subharmonic of the 401 Hz rotation rate in the frequencies of the QPOs detected in the accreting millisecond pulsar is at once a signature of non-linear resonance and of coupling between accretion disk modes and the neutron star spin.

presented at X-ray Timing 2003: Rossi and Beyond, Boston, November 2003

References in corpus (1)

• Interpreting black hole QPOs

Cited by in corpus (6)

• X-ray Spectral States and High-Frequency QPOs in Black Hole Binaries
• An explanation for the kHz-QPO twin peaks separation in slow and fast rotators
• Relativistic, Viscous, Radiation Hydrodynamic Simulations of Geometrically Thin Disks. II. Disk Variability
• A General Relativistic Magnetohydrodynamic Model of High Frequency Quasi-periodic Oscillations in Black Hole Low-Mass X-ray Binaries
• A toy model for coupling accretion disk oscillations to the neutron star spin
• Eigenmodes of trapped horizontal oscillations in accretion disks