Testing General Relativity using QuasiPeriodic Oscillations from Xray Black Holes: XTE J1550564 and GRO J165540
Abstract
We use the Relativistic Precession Model (RPM) (Stella et al. 1999a) and quasiperiodic oscillation (QPO) observations from the Rossi Xray Timing Explorer to derive constraints on the properties of the black holes that power these sources and to test General Relativity (GR) in the strong field regime. We extend the techniques outlined by Motta et al. (2014a,b) to use pairs of simultaneously measured QPOs, rather than triplets, and extend the underlying spacetime metric to constrain potential deviations from the predictions of GR for astrophysical black holes. To do this, we modify the RPM model to a KerrNewmandeSitter spacetime and model changes in the radial, ecliptic, and vertical frequencies. We compare our models with Xray data of XTE J1550564 and GRO J165540 using robust statistical techniques to constrain the parameters of the black holes and the deviations from GR. For both sources we constrain particular deviations from GR to be less than one part per thousand.
 Publication:

arXiv eprints
 Pub Date:
 July 2021
 arXiv:
 arXiv:2107.06828
 Bibcode:
 2021arXiv210706828R
 Keywords:

 Astrophysics  High Energy Astrophysical Phenomena;
 General Relativity and Quantum Cosmology
 EPrint:
 9 pages, 7 figures