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Testing general relativity with supermassive black holes using X-ray reflection spectroscopy

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arxiv 1905.08012 v1 pith:MPJQRVGQ submitted 2019-05-20 gr-qc astro-ph.HE

Askar B. Abdikamalov , Dimitry Ayzenberg , Cosimo Bambi , Sourabh Nampalliwar , Ashutosh Tripathi , Jelen Wong , Yerong Xu , Jinli Yan
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Yunfeng Yan Yuchan Yang
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classification gr-qcastro-ph.HE
keywords blackgeneralholesrelativitymetricreflectionspacetimesupermassive
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In this paper, we review our current efforts to test General Relativity in the strong field regime by studying the reflection spectrum of supermassive black holes. So far we have analyzed 11 sources with observations of NuSTAR, Suzaku, Swift, and XMM-Newton. Our results are consistent with general relativity, according to which the spacetime metric around astrophysical black holes should be well approximated by the Kerr solution. We discuss the systematic uncertainties in our model and we present a preliminary study on the impact of some of them on the measurement of the spacetime metric.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Reflection spectra of thick accretion disks

    astro-ph.HE 2019-08 accept novelty 7.0 of 10

    Reflection spectra from thick (Polish donut) accretion disks, when analyzed with thin-disk models, bias black hole spin upward and can create or mask apparent deviations from the Kerr metric.

  2. Relativistic reflection spectra of super-spinning black holes

    gr-qc 2019-08 conditional novelty 6.0 of 10

    Fitting Suzaku reflection spectra with a super-spinning spacetime model finds apparent deviations from Kerr in Ark 120 and Swift J0501.9, but the 3-sigma claim is not consistently supported for Swift.

  3. RELXILL_NK: A Black Hole Relativistic Reflection Model for Testing General Relativity

    gr-qc 2019-08 conditional novelty 3.0 of 10

    RELXILL_NK, a publicly available X-ray reflection model that includes non-Kerr black hole spacetimes, is presented and three of its flavors are compared using the Johannsen metric.

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