A simple model for the complex lag structure of microquasars

Abstract

The phase lag structure between the hard and soft X-ray photons observed in GRS 1915+105 and XTE J1550+564 has been said to be ``complex'' because the phase of the Quasi-Periodic Oscillation fundamental Fourier mode changes with time and because the even and odd harmonics signs behave differentely. From simultaneous X-ray and radio observations this seems to be related to the presence of a jet (level of radio emission). We propose a simple idea where a partial absorption of the signal can shift the phases of the Fourier modes and account for the phase lag reversal. We also briefly discuss a possible physical mechanism that could lead to such an absorption of the quasi-periodic oscillation modulation.

accepted by A&A Letters

References in corpus (1)

• Radio Emission and the Timing Properties of the Hard X-ray State of GRS 1915+105

Cited by in corpus (4)

• Alternating lags of QPO harmonics : A Generic model and its application to the 67 millihertz QPO of GRS 1915+105
• Connection between accretion disk and superluminal radio jets and the role of radio plateau state in GRS 1915+105
• Correlated X-ray spectral and timing variability of the Be/X-ray binary V0332+53/BQ Cam during a type II outburst
• Flux Modulation from Non-Axisymmetric Stuctures in Accretion Discs