{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,8]],"date-time":"2026-02-08T15:10:16Z","timestamp":1770563416607,"version":"3.49.0"},"reference-count":44,"publisher":"American Astronomical Society","issue":"1","license":[{"start":{"date-parts":[[2017,6,27]],"date-time":"2017-06-27T00:00:00Z","timestamp":1498521600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/iopscience.iop.org\/page\/copyright"},{"start":{"date-parts":[[2017,6,27]],"date-time":"2017-06-27T00:00:00Z","timestamp":1498521600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/iopscience.iop.org\/info\/page\/text-and-data-mining"}],"content-domain":{"domain":["iopscience.iop.org"],"crossmark-restriction":false},"short-container-title":["ApJ"],"published-print":{"date-parts":[[2017,7,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Future very-large-area X-ray instruments (for which the\u00a0effective area is\u00a0larger than <jats:inline-formula>\n                     <jats:tex-math>\n\n<\/jats:tex-math>\n                     <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"apjaa72e2ieqn1.gif\" xlink:type=\"simple\"\/>\n                  <\/jats:inline-formula> m<jats:sup>2<\/jats:sup>) will be able to measure the frequencies of quasi-periodic oscillations\u00a0(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.<\/jats:p>","DOI":"10.3847\/1538-4357\/aa72e2","type":"journal-article","created":{"date-parts":[[2017,6,27]],"date-time":"2017-06-27T17:14:06Z","timestamp":1498583646000},"page":"25","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":48,"title":["Geodesic Models of Quasi-periodic-oscillations as Probes of Quadratic Gravity"],"prefix":"10.3847","volume":"843","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8515-8525","authenticated-orcid":false,"given":"Andrea","family":"Maselli","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4443-1761","authenticated-orcid":false,"given":"Paolo","family":"Pani","sequence":"additional","affiliation":[]},{"given":"Roberto","family":"Cotesta","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1097-3266","authenticated-orcid":false,"given":"Leonardo","family":"Gualtieri","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0600-6070","authenticated-orcid":false,"given":"Valeria","family":"Ferrari","sequence":"additional","affiliation":[]},{"given":"Luigi","family":"Stella","sequence":"additional","affiliation":[]}],"member":"2208","published-online":{"date-parts":[[2017,6,27]]},"reference":[{"key":"apjaa72e2bib2","doi-asserted-by":"publisher","first-page":"1","DOI":"10.1016\/j.physrep.2009.07.002","volume":"480","author":"Alexander","year":"2009","journal-title":"PhR"},{"key":"apjaa72e2bib3","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevD.84.124033","volume":"84","author":"Ali-Haimoud","year":"2011","journal-title":"PhRvD"},{"key":"apjaa72e2bib4","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevD.90.044066","volume":"90","author":"Ayzenberg","year":"2014","journal-title":"PhRvD"},{"key":"apjaa72e2bib5","doi-asserted-by":"publisher","first-page":"014","DOI":"10.1088\/1475-7516\/2012\/09\/014","volume":"1209","author":"Bambi","year":"2012","journal-title":"JCAP"},{"key":"apjaa72e2bib6","doi-asserted-by":"publisher","first-page":"162","DOI":"10.1140\/epjc\/s10052-015-3396-7","volume":"75","author":"Bambi","year":"2015","journal-title":"EPJC"},{"key":"apjaa72e2bib7","doi-asserted-by":"publisher","DOI":"10.1088\/0264-9381\/32\/24\/243001","volume":"32","author":"Berti","year":"2015","journal-title":"CQGra"},{"key":"apjaa72e2bib8","doi-asserted-by":"publisher","first-page":"403","DOI":"10.1086\/431174","volume":"629","author":"Casella","year":"2005","journal-title":"ApJ"},{"key":"apjaa72e2bib9","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevD.91.024027","volume":"91","author":"Delsate","year":"2015","journal-title":"PhRvD"},{"key":"apjaa72e2bib10","first-page":"3","author":"Fabian","year":"2013"},{"key":"apjaa72e2bib11","doi-asserted-by":"publisher","first-page":"99051R","DOI":"10.1117\/12.2233161","volume":"9905","author":"Feroci","year":"2016","journal-title":"Proc. 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