Numerical simulations of oscillating tori in a pseudo-Newtonian   potential
  We have modeled hydrodynamical tori in the Klu{\'z}niak-Lee pseudo-Newtonian potential. The tori in equilibrium were perturbed with uniform sub-sonic velocity fields: vertical, radial and diagonal respectively, and allowed to evolve in time. We identify the eigenmodes corresponding to those of slender tori. The results of our simulations are relevant to the investigation of high-frequency quasi-periodic oscillations observed in stellar-mass black hole binaries. 
Varadarajan Parthasarathy, Antonios Manousakis, Wlodek Kluzniak
astro-ph.HE