Energy spectra of X-ray quasi-periodic oscillations in the Lense-Thirring precession model

Understand

We model the energy dependence of a quasi periodic oscillation (QPOs) produced by Lense-Thirring precession of a hot inner flow.

• We use a fully 3-dimensional Monte-Carlo code to compute the Compton scattered flux produced by the hot inner flow intercepting seed photons from an outer truncated standard disc.
• The changing orientation of the precessing torus relative to the line of sight produces the observed modulation of the X-ray flux.
• We consider two scenarios of precession.