Accretion-ejection instability and QPO in black-hole binaries.II. Relativistic effects

Abstract

The Accretion-Ejection Instability has been proposed to explain the low frequency Quasi-Periodic Oscillation (QPO) observed in low-mass X-Ray Binaries, in particular Black-Hole candidates. Its frequency, typically a fraction of the Keplerian frequency at the disk inner radius, is exactly in the range indicated by observations. The variations of the frequency with the disk inner radius (extracted from spectral fits of the X-ray emission) might thus be a useful test. In this paper we discuss how changes in the rotation curve, due to relativistic effects when the disk approaches the central object, affect the physics of the instability, and thus this frequency-inner radius relation. We find that the relationship between the frequency of the mode and the Keplerian frequency at the inner disk radius ($r_{int}$) departs from the one obtained in a Keplerian disk, when $r_{int}$ approaches the last stable orbit. This might agree with the recently published results, showing a discrepancy between the behavior of the QPO in the micro quasar GRO J1655, compared to other sources such as XTE J1550 and GRS 1915. In a companion paper (Rodriguez et al., 2002, hereafter Paper I) we have presented detailed observational results for GRO J1655 and GRS 1915. We show how the opposite correlations found in these sources between the disk color radius (assumed to be close to its inner radius) and the QPO frequency could indeed be explained by our theoretical result.

arXiv commentaccepted by A&A

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• An HLLC Solver for Relativistic Flows -- II. Magnetohydrodynamics
• Tracing the power-law component in the energy spectrum of black hole candidates as a function of the QPO frequency
• Discovery of oscillations above 200 keV in a black hole X-ray binary with Insight-HXMT
• Multiwavelength observations revealing the evolution of the outburst of the black hole XTE J1118+480
• Rossby Wave Instability and three-dimensional vortices in accretion disks
• Accretion-Ejection Instability, MHD Rossby Wave Instability, diskoseismology, and the high-frequency QPO of microquasars
• Accretion-ejection instability and QPO in black hole binaries. I. Observations
• A General Relativistic Magnetohydrodynamics Simulation of Jet Formation
• The Galactic black hole transient H1743-322 during outburst decay: connections between timing noise, state transitions and radio emission
• Accretion-ejection instability in magnetized disks: Feeding the corona with Alfven waves
• An X-ray Timing Study of XTE J1550--564: Evolution of the Low Frequency QPO for the Complete 2000 Outburst
• Phase-resolved spectroscopy of a quasi-periodic oscillation in the black hole X-ray binary GRS 1915+105 with NICER and NuSTAR
• Magnetic floods: a scenario for the variability of the microquasar GRS 1915+105
• Spectral hardening as a viable alternative to disc truncation in black hole state transitions
• A possible interpretation for the apparent differences in LFQPO types in microquasars
• CH Cygni I: Observational Evidence for a Disk-Jet Connection
• Identification of QPO frequency of GRS 1915+105 as the relativistic dynamic frequency of a truncated accretion disk
• Detection of a possible high-confidence radio quasi-periodic oscillation in the BL Lac PKS J2134-0153
• A unified accretion-ejection paradigm for black hole X-ray binaries. V. Low-frequency quasi-periodic oscillations
• An HLLC Riemann Solver for Resistive Relativistic Magnetohydrodynamics
• Are Low-Frequency Quasi-Periodic Oscillations seen in accretion flows the disk response to a jet instability?
• An underlying clock in the extreme flip-flop state transitions of the black hole transient Swift J1658.2-4242
• Timing analysis of the black hole candidate EXO 1846-031 with Insight-HXMT monitoring
• A microquasar classification from a disk instability perspective
• Impact of inclination on quasi-periodic oscillations from spiral structures
• A broadband spectral-timing study of QPOs in the bright black hole X-ray binary Swift J1727.8-1613
• A Likely Inclination Dependence in the Non-linear Variability of Quasi Periodic Oscillations from Black Hole Binaries
• QPO Frequency - Color Radius Connection in GRS 1915+105: a Possible Turnover supporting AEI predictions
• Fast Timing Analysis of Cygnus X-1 using SPI on board INTEGRAL
• A possible imprint of quasi-periodic oscillations in the X-ray spectra of black hole binaries
• Variable QPO lags and reduced coherence between the disc and corona in MAXI J1820+070
• Investigating the connection between Quasi Periodic Oscillations and spectral components with NuSTAR data of GRS 1915+105
• Ultraviolet spectroscopy of the black hole X-ray binary MAXI J1820+070 across a state transition