A jet model for Galactic black-hole X-ray sources: the cutoff energy-phase-lag correlation

Abstract

Galactic black-hole X-ray binaries emit a compact, optically thick, mildy relativistic radio jet when they are in the hard and hard-intermediate states. In a series of papers, we have developed a jet model and have shown, through Monte Carlo simulations, that our model can explain many observational results. In this work, we investigate one more constraining relationship between the cutoff energy and the phase lag during the early stages of an X-ray outburst of the black-hole X-ray binary GX 339-4: the cutoff energy decreases while the phase lag increases during the brightening of the hard state. We demonstrate that our jet model naturally explains the above correlation, with a minor modification consisting of introducing an acceleration zone at the base of the jet. The observed correlation between the cutoff energy and the phase lag suggests that the lags are produced by the hard component. Here we show that this correlation arises naturally if Comptonization in the jet produces these two quantities.

5 pages, 4 figures, accepted for publication in A&A

References in corpus (8)

• X-ray Properties of Black-Hole Binaries
• Modelling the behaviour of accretion flows in X-ray binaries
• Fast variability from black-hole binaries
• A jet model for Galactic black-hole X-ray sources: Some constraining correlations
• Accretion and ejection in black-hole X-ray transients
• Effects of Compton Cooling on Outflow in a Two Component Accretion Flow around a Black Hole: Results of a Coupled Monte Carlo-TVD Simulation
• The evolution of the X-ray phase lags during the outbursts of the black hole candidate GX 339-4
• Confirming the thermal Comptonization model for black hole X-ray emission in the low-hard state

Cited by in corpus (18)

• Time lags of the type-B QPO in MAXI J1348-630
• Propagating mass accretion rate fluctuations in X-ray binaries under the influence of viscous diffusion
• Dual-Corona Comptonization model for the Type-B Quasi-Periodic Oscillations in GX 339-4
• The time-lag -- photon-index correlation in GX 339--4
• A quantitative explanation of the type-B QPOs in GX 339-4
• The photon-index - time-lag correlation in black-hole X-ray binaries
• Illumination of the accretion disk in black hole binaries: An extended jet as the primary source of hard X-rays
• Inclination effects on the X-ray emission of Galactic black-hole binaries
• Spectro-temporal studies of rapid transition of the quasi periodic oscillations in the black hole source H1743-322
• Constraining the Coronal Heights and Readjustment Velocities Based on the Detection of a Few Hundred Seconds Delays in the Z Source GX 17+2
• On the origin of the hard X-ray tail in neutron-star X-ray binaries
• The prototype X-ray binary GX 339-4: using TeV gamma-rays to assess LMXBs as Galactic cosmic ray accelerators
• X-ray and Optical Observations of the Black Hole Candidate MAXI J1828-249
• The X-ray view of black-hole candidate Swift J1842.5-1124 during its 2008 outburst
• The energy distribution of electrons in radio jets
• Fe K$\alpha$ and Fe K$\beta$ line detection in the NuSTAR spectrum of the ultra-bright Z-source Scorpius X-1
• A quantitative explanation of the radio--X-ray correlation in black-hole X-ray binaries
• The role of outflows in black-hole X-ray binaries