N. Kylafis, P. Reig
Published 2019-11-27Version 1
Recently, we reported an observational correlation between a) the time-lag of the hard (9 - 15 keV) with respect to the soft (2 - 5 keV) X-ray photons in black-hole X-ray binaries (BHXRBs) and b) the power-law photon index $\Gamma$ of the X-ray spectrum. This was physically explained with a simple jet model, i.e., a model where the Comptonization (the Compton upscattering of soft photons) happens in the jet. Here, we report the inclination dependence of this correlation, which we also explain with our jet model. Photons that emerge at different polar angles from the jet axis have different spectra and different time-lags. Because of this, we can explain quantitatively the type-B QPOs of GX 339-4 as resulting from a precessing jet.
The cause of the difference in the propagation distances between compact and transient jets in black-hole X-ray binaries
The photon-index - time-lag correlation in black-hole X-ray binaries
vKompth: A variable Comptonisation model for low-frequency quasi-periodic oscillations in black-hole X-ray binaries
![QR code for arXiv:1911.11975 [astro-ph.HE]](http://oss.arxitics.com/images/favicon.svg)