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

Nampalliwar S, Xin S, Srivastava S, Abdikamalov AB, Ayzenberg D, Bambi C, Dauser T, Garcia J, Tripathi A (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Physical Review D American Physical Society

Book Volume: 102

Journal Issue: 12

DOI: 10.1103/PhysRevD.102.124071

Abstract

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)] form an important class of non-Kerr black holes. We implement this class of black hole metrics in RELX1LL_NK, which is a framework we have developed for testing for non-Kerr black holes using x-ray reflection spectroscopy. We perform a qualitative analysis of the effect of the leading order strong-field deformation parameters on typical observables like the innermost stable circular orbits and the reflection spectra. We also present the first x-ray constraints on some of the deformation parameters of this metric, using Suzaku data from the supermassive black hole in Ark 564, and compare them with those obtained (or expected) from other observational techniques like gravitational waves and black hole imaging.

Authors with CRIS profile

Thomas Dauser Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut Javier Garcia Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut

Involved external institutions

Eberhard Karls Universität Tübingen DE Germany (DE) Tongji University / 同济大学 CN China (CN) Indian Institute of Technology Bombay IN India (IN) Fudan University / 复旦大学 CN China (CN)

How to cite

APA:

Nampalliwar, S., Xin, S., Srivastava, S., Abdikamalov, A.B., Ayzenberg, D., Bambi, C.,... Tripathi, A. (2020). Testing general relativity with x-ray reflection spectroscopy: The Konoplya-Rezzolla-Zhidenko parametrization. Physical Review D, 102(12). https://dx.doi.org/10.1103/PhysRevD.102.124071

MLA:

Nampalliwar, Sourabh, et al. "Testing general relativity with x-ray reflection spectroscopy: The Konoplya-Rezzolla-Zhidenko parametrization." Physical Review D 102.12 (2020).

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