Search Publications

Testing general relativity with x-ray reflection spectroscopy: The Konoplya-Rezzolla-Zhidenko parametrization

Tripathi, Ashutosh; Abdikamalov, Askar B.; Ayzenberg, Dimitry +6 more

X-ray reflection spectroscopy is a promising technique for testing general relativity in the strong-field regime as it can be used to test the Kerr black hole hypothesis. In this context, the parametrically deformed black hole metrics proposed by Konoplya, Rezzolla, and Zhidenko [Phys. Rev. D 93, 064015 (2016), 10.1103/PhysRevD.93.064015] form an …

Testing the Keplerian disk hypothesis using x-ray reflection spectroscopy

Tripathi, Ashutosh; Zhou, Biao; Abdikamalov, Askar B. +3 more

The Novikov-Thorne model is the standard framework for the description of geometrically thin and optically thick accretion disks around black holes and is widely used to study the electromagnetic spectra of accreting black holes. One of the assumptions of the model is that the particles of the gas move on nearly geodesic circular orbits on the equ…