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http://hdl.handle.net/20.500.12386/29764
Titolo: | Geodesic Models of Quasi-periodic-oscillations as Probes of Quadratic Gravity | Autori: | MASELLI, ANDREA Pani, Paolo Cotesta, Roberto Gualtieri, Leonardo Ferrari, Valeria STELLA, Luigi |
Data pubblicazione: | 2017 | Rivista: | THE ASTROPHYSICAL JOURNAL | Numero: | 843 | Fascicolo: | 1 | Da pagina:: | 25 | Abstract: | Future very-large-area X-ray instruments (for which the effective area is larger than > 3 m<SUP>2</SUP>) 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. | URI: | http://hdl.handle.net/20.500.12386/29764 | URL: | https://iopscience.iop.org/article/10.3847/1538-4357/aa72e2 | ISSN: | 0004-637X | DOI: | 10.3847/1538-4357/aa72e2 | Bibcode ADS: | 2017ApJ...843...25M | Fulltext: | open |
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