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Universe 2018, 4(7), 79; https://doi.org/10.3390/universe4070079

relxill_nk: A Relativistic Reflection Model for Testing Einstein’s Gravity

1
Center for Field Theory and Particle Physics and Department of Physics, Fudan University, Shanghai 200438, China
2
Theoretical Astrophysics, Eberhard-Karls Universität Tübingen, 72076 Tübingen, Germany
3
MIT Kavli Institute for Astrophysics and Space Research, MIT, Cambridge, MA 02139, USA
*
Author to whom correspondence should be addressed.
Received: 7 June 2018 / Revised: 4 July 2018 / Accepted: 9 July 2018 / Published: 11 July 2018
(This article belongs to the Special Issue Gravity, Black Holes and Cosmology XXI)
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Abstract

Einstein’s theory of general relativity was proposed over 100 years ago and has successfully passed a large number of observational tests in the weak field regime. However, the strong field regime is largely unexplored, and there are many modified and alternative theories that have the same predictions as Einstein’s gravity for weak fields and present deviations when gravity becomes strong. relxill_nk is the first relativistic reflection model for probing the spacetime metric in the vicinity of astrophysical black holes and testing Einstein’s gravity in the strong field regime. Here, we present our current constraints on possible deviations from Einstein’s gravity obtained from the black holes in 1H0707–495, Ark 564, GX 339–4, and GS 1354–645. View Full-Text
Keywords: general relativity; black boles; X-ray astronomy general relativity; black boles; X-ray astronomy
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Bambi, C.; Abdikamalov, A.B.; Ayzenberg, D.; Cao, Z.; Liu, H.; Nampalliwar, S.; Tripathi, A.; Wang-Ji, J.; Xu, Y. relxill_nk: A Relativistic Reflection Model for Testing Einstein’s Gravity. Universe 2018, 4, 79.

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