Resonant Excitation of Disk Oscillations by Warps: A Model of kHz QPOs

摘要: The amplification of disk oscillations resulting from non-linear resonant couplings between the and a warp is examined. disks are geometrically thin general relativistic with non-rotating central objects. By using Lagrangian formulation, stability criterion derived. applied to horizontal vertical resonances g-mode p-mode oscillations. results analyses show that (including n = 0) amplified by warp. Other modes other all damped resonances. located around radius 4 rg, epicyclic frequency being maximum, i.e., κmax. frequencies harmonics κmax, well explain 2 : 3 pairs observed QPOs for reasonable masses (and spins)