Inclination effects on the X-ray emission of Galactic black-hole binaries

Abstract

Galactic black-hole X-ray binaries (BHBs) emit a compact, optically thick, mildly relativistic radio jet when they are in the hard and hard-intermediate states. In these states, BHBs exhibit a correlation between the time lag of hard photons with respect to softer ones and the photon index of the power law component that characterizes the X-ray spectral continuum above $\sim$ 10 keV. The correlation, however, shows large scatter. Our objective is to investigate the role that the inclination of the system plays on the correlation between the time lag and the photon index. We find that the correlation between the time lag and the photon index is tight in low-inclination systems and becomes weaker in high-inclination systems. The amplitude of the lags is also larger at low and intermediate inclination angles than at high inclination. Our jet model that reproduces the process of Comptonization in an extended jet can account for the observations remarkably well.

References in corpus (13)

• X-ray Properties of Black-Hole Binaries
• Geometrical constraints on the origin of timing signals from black holes
• Inclination dependence of QPO phase lags in black hole X-ray binaries
• Chandra X-ray spectroscopy of the focused wind in the Cygnus X-1 system. I. The non-dip spectrum in the low/hard state
• High Density Reflection Spectroscopy I. A case study of GX~339-4
• Tomographic reflection modelling of quasi-periodic oscillations in the black hole binary H 1743-322
• Revealing accretion onto black holes: X-ray reflection throughout three outbursts of GX 339-4
• Inclination-dependent spectral and timing properties in transient black hole X-ray 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 photon-index - time-lag correlation in black-hole X-ray binaries
• The X-ray view of black-hole candidate Swift J1842.5-1124 during its 2008 outburst

Cited by in corpus (11)

• Time lags of the type-B QPO in MAXI J1348-630
• Dual-Corona Comptonization model for the Type-B Quasi-Periodic Oscillations in GX 339-4
• A quantitative explanation of the type-B QPOs in GX 339-4
• Illumination of the accretion disk in black hole binaries: An extended jet as the primary source of hard X-rays
• Spectro-temporal studies of rapid transition of the quasi periodic oscillations in the black hole source H1743-322
• Time-domain variability properties of XTE J1650-500 during its 2001 outburst: Evidence of disc-jet connection
• The X-ray corona in the black-hole binary GRO J1655--40 from the properties of non-harmonically related quasi-periodic oscillations
• Spectral and Timing evolution of GX 340+0 along its Z-track
• A quantitative explanation of the radio--X-ray correlation in black-hole X-ray binaries
• Probing black-hole accretion through time variability
• The role of outflows in black-hole X-ray binaries