Quasi-Periodic Oscillations Resonantly Induced on Spin-Induced Deformed-Disks of Neutron Stars

Abstract

We consider the situation where a spin-induced wavy perturbation is present on disks of neutron-star low-mass X-ray binaries. By non-linearly coupling with the perturbation, some modes of disk oscillations resonantly interact with the disks. We examine the resonant conditions under the assumption that the disks are vertically isothermal. The results show that when the spin frequency has some particular values, resonant coupling occurs at some radii. The modes and frequencies of these resonant oscillations are summarized. Some of these resonant oscillations seem to explain the frequencies of the observed kHz QPOs in objects of which the spin frequency is known.

21 pages, 1 figure, 13 tables. To be published in PASJ 57, No. 4 (2005)

References in corpus (4)

• Excitation of Disk Oscillations by Warps: A Model of kHz QPOs
• Resonance in Forced Oscillations of an Accretion Disk and Kilohertz Quasi Periodic Oscillations
• A Vertical Resonances of G-Mode Oscillations in Warped Disks and QPOs in Low-Mass X-Ray Binaries
• A Resonance Model of Quasi-Periodic Oscillations of Low-Mass X-Ray Binaries

Cited by in corpus (5)

• Transient Black Hole Binaries
• Quasi periodic oscillations in black hole binaries
• Frequency Correlations of QPOs Based on a Disk Oscillation Model in Warped Disks
• Internal resonance in non-linear disk oscillations and the amplitude evolution of neutron star kilohertz QPOs
• Confronting models for the high-frequency QPOs with Lense-Thirring precession