What can we extract from quasi-periodic oscillations?

Abstract

In light of the relativistic precession model, we present here detailed analyses, extending the ones performed in the Schwarzschild and Kerr spacetimes. We consider the kilohertz quasi-periodic oscillations in the Hartle-Thorne spacetime, which describes the gravitational field of a rotating and deformed object. We derive the analytic formulas for the epicyclic frequencies in the Hartel-Thorne spacetime and by means of these frequencies we interpret the kilohertz quasi-periodic oscillations of low-mass X-ray binaries of the atoll and Z - sources, on the basis of the relativistic precession model. Particularly we perform analyzes for Z -source: GX 5-1. We show that the quasi-periodic oscillations data can provide information on the parameters, namely, the mass, angular momentum and quadrupole moment of the compact objects in the low-mass X-ray binaries.

8 pages, 11 figures. arXiv admin note: text overlap with arXiv:1008.0088, arXiv:1201.6071 by other authors

References in corpus (4)

• On the kHz QPO frequency correlations in bright neutron star X-ray binaries
• Is there a link between the neutron-star spin and the frequency of the kilohertz quasi-periodic oscillations?
• On mass-constraints implied by the relativistic precession model of twin-peak quasi-periodic oscillations in Circinus X-1
• Discovery of the upper kilo-Hz QPO from the X-ray transient Aql X-1

Cited by in corpus (3)

• Constraint on parameters of a rotating black hole in Einstein-bumblebee theory by quasi-periodic oscillations
• Epicyclic oscillations in the Hartle-Thorne external geometry
• Slowly-rotating compact objects: the nonintegrability of Hartle-Thorne particle geodesics