Geodesic Models of Quasi-periodic-oscillations as Probes of Quadratic Gravity
Journal
Date Issued
2017
Author(s)
Abstract
Future very-large-area X-ray instruments (for which the effective area is larger than > 3 m2) will be able to measure the frequencies of quasi-periodic oscillations (QPOs) observed in the X-ray flux from accreting compact objects with sub-percent precision. If correctly modeled, QPOs can provide a novel way to test the strong-field regime of gravity. By using the relativistic precession model and a modified version of the epicyclic resonance model, we develop a method to test general relativity against a generic class of theories with quadratic curvature corrections. With the instrumentation being studied for future missions such as eXTP, LOFT, or STROBE-X, a measurement of at least two QPO triplets from a stellar mass black hole can set stringent constraints on the coupling parameters of quadratic gravity.
Volume
843
Issue
1
Start page
25
Issn Identifier
0004-637X
Ads BibCode
2017ApJ...843...25M
Rights
open.access
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