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http://hdl.handle.net/20.500.12386/29771
Titolo: | Testing Gravity with Quasi-periodic Oscillations from Accreting Black Holes: The Case of Einstein-Dilaton-Gauss-Bonnet Theory | Autori: | MASELLI, ANDREA Gualtieri, Leonardo Pani, Paolo STELLA, Luigi Ferrari, Valeria |
Data pubblicazione: | 2015 | Rivista: | THE ASTROPHYSICAL JOURNAL | Numero: | 801 | Fascicolo: | 2 | Da pagina:: | 115 | Abstract: | Quasi-periodic oscillations (QPOs) observed in the X-ray flux emitted by accreting black holes are associated with phenomena occurring near the horizon. Future very large area X-ray instruments will be able to measure QPO frequencies with very high precision, thus probing this strong-field region. Using the relativistic precession model, we show the way in which QPO frequencies could be used to test general relativity (GR) against those alternative theories of gravity which predict deviations from the classical theory in the strong-field and high-curvature regimes. We consider one of the best-motivated high-curvature corrections to GR, namely, the Einstein-Dilaton-Gauss-Bonnet theory, and show that a detection of QPOs with the expected sensitivity of the proposed ESA M-class mission LOFT would set the most stringent constraints on the parameter space of this theory. | URI: | http://hdl.handle.net/20.500.12386/29771 | URL: | https://iopscience.iop.org/article/10.1088/0004-637X/801/2/115 | ISSN: | 0004-637X | DOI: | 10.1088/0004-637X/801/2/115 | Bibcode ADS: | 2015ApJ...801..115M | Fulltext: | open |
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