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Testing the Kerr hypothesis using X-ray reflection spectroscopy with NuSTAR data of Cygnus X-1 in the soft state

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arxiv 1904.08027 v2 pith:FGM57NEH submitted 2019-04-17 gr-qc astro-ph.HE

Honghui Liu , Askar B. Abdikamalov , Dimitry Ayzenberg , Cosimo Bambi , Thomas Dauser , Javier A. Garcia , Sourabh Nampalliwar This is my paper · ORCID
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keywords cygnusreflectionspectroscopyx-raynustarsoftstateanalysis
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We continue exploring the constraining capabilities of X-ray reflection spectroscopy to test the Kerr-nature of astrophysical black holes and we present the results of our analysis of two NuSTAR observations of Cygnus X-1 in the soft state. We find that the final measurement can strongly depend on the assumption of the intensity profile. We conclude that Cygnus X-1 is not suitable for tests of general relativity using X-ray reflection spectroscopy and we discuss the desired properties of a source to be a good candidate for our studies.

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Cited by 2 Pith papers

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

  1. 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.

  2. 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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