There have been many efforts to explain the dynamical mechanisms behind the
phenomenology of quasi-periodic oscillations (QPOs) seen in the X-ray light curves of low …

Estimations of black hole spin in the three Galactic microquasars GRS 1915+ 105, GRO
J1655-40, and XTE J1550-564 have been carried out based on spectral and timing X-ray …

We simulate an oscillating polytropic torus with constant specific angular momentum around
a Schwarzschild black hole. The goal is to search for quasi-periodic oscillations in the light …

The active galactic nucleus (AGN) RE J1034+ 396 displays the most significant X-ray quasi-
periodic oscillation (QPO) detected so far. We perform a detailed spectral-timing analysis of …

Context. High-frequency (millisecond) quasi-periodic oscillations (HF QPOs) are observed in
the X-ray power-density spectra of several microquasars and low-mass X-ray binaries. Two …

We study the dynamics of radiation pressure supported tori around Schwarzschild black
holes, focusing on their oscillatory response to an external perturbation. Using koral, a …

Context. While nobody would deny the presence of quasi-periodic oscillations in the power
density spectrum of black hole binaries nor their importance in the understanding of the …

We performed axisymmetric hydrodynamical simulations of oscillating tori orbiting a non-
rotating black hole. The tori in equilibrium were constructed with a constant distribution of …

High frequency (millisecond) quasi-periodic oscillations (HF QPOs) are observed in the X-
ray power-density spectra of several microquasars and low mass X-ray binaries. Two distinct …

There have been many efforts to explain the dynamical mechanisms behind the
phenomenology of quasi-periodic oscillations (QPOs) seen in the X-ray light curves of low …