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http://hdl.handle.net/20.500.12386/29764
Title: | Geodesic Models of Quasi-periodic-oscillations as Probes of Quadratic Gravity | Authors: | MASELLI, ANDREA Pani, Paolo Cotesta, Roberto Gualtieri, Leonardo Ferrari, Valeria STELLA, Luigi |
Issue Date: | 2017 | Journal: | THE ASTROPHYSICAL JOURNAL | Number: | 843 | Issue: | 1 | First Page: | 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 |
Appears in Collections: | 1.01 Articoli in rivista |
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File | Description | Size | Format | |
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Maselli_2017_ApJ_843_25.pdf | pdf editoriale | 1.85 MB | Adobe PDF | View/Open |
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