Testing Strong-field Gravity with Quasi-Periodic Oscillations

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dc.creatorDeDeo, Simon
dc.creatorPsaltis, Dimitrios
dc.date2004-05-04
dc.date.accessioned2026-07-07T02:13:06Z
dc.date.available2026-07-07T02:13:06Z
dc.descriptionThe frequencies of quasi-periodic oscillations around neutron stars are believed to be related to characteristic frequencies in the gravitational fields of the compact objects. In different variability models, these include the Keplerian, epicyclic, and Lense-Thirring frequencies, which depend mostly on the properties of the stellar spacetimes. We argue that quasi-periodic oscillations in the X-ray flux of neutron stars can be used to map the external spacetimes of the compact objects and, therefore, lead to direct tests of general relativity in the strong-field regime. In particular, we show that particular extensions of General Relativity, in which the gravitational force felt by matter is mediated by both a rank-two tensor and a scalar field, can be constrained by current observations.
dc.description6 pages, 7 figures, submitted to Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/astro-ph/0405067
dc.identifierhttp://arxiv.org/abs/astro-ph/0405067
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/7694
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleTesting Strong-field Gravity with Quasi-Periodic Oscillations
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