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Context. One of the often discussed models for X-ray binaries high-frequencyquasi-periodic oscillations is the oscillating torus model that considersoscillation modes of slender accretion tori. Aims. Here, we aim at developingthis model by considering the observable signature of an optically thickslender accretion torus subject to simple periodic deformations. Methods. Wecompute light curves and power spectra of a slender accretion torus subject tosimple periodic deformations: vertical or radial translation, rotation,expansion and shear. Results. We show that different types of deformations leadto very different Fourier power spectra and therefore could be observationallydistinguished. Conclusions. This work is a first step in a longer-term study ofthe observable characteristics of the oscillating torus model. It givespromising perspectives on the possibility to constrain this model by studyingthe observed power spectra of quasi-periodic oscillations.

Towards modeling quasi-periodic oscillations of microquasars with oscillating slender tori