A jet model for black-hole X-ray sources

Abstract

A jet model for Galactic black-hole X-ray binaries will be presented that appears to explain several observational characteristics. In particular, it explains the energy spectrum from radio to hard X-rays, the time-lags as a function of Fourier frequency, the increase of the variability amplitude (QPO and high frequency) with increasing photon energy, and the narrowing of the autocorrelation function with increasing photon energy. On the other hand, there are additional observational constraints that no model has tried to explain yet. It is important that we all try to address these constraints if we are to make any progress in understanding black-hole X-ray sources.

The nature of the intranight variability of radio-quiet quasars

“…Such a possibility was discussed mostly within the frame of galactic accreting black holes (see e.g. Kylafis, Papadakis & Reig 2007). However, the question is open, and in particular, the correlation between the radio and the X-ray emission is by no means simple (see e.g.…”