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Constraints on the Spacetime Metric around Seven "Bare" AGNs Using X-Ray Reflection Spectroscopy

Tripathi A, Yan J, Yang Y, Yan Y, Garnham M, Yao Y, Li S, Ding Z, Abdikamalov AB, Ayzenberg D, Bambi C, Dauser T, Garcia J, Jiang J, Nampalliwar S (2019)

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Publication Type: Journal article

Publication year: 2019

Journal

Book Volume: 874

Journal Issue: 2

DOI: 10.3847/1538-4357/ab0a00

Abstract

We present the study of a sample of seven "bare" active galactic nuclei observed with Suzaku. We interpret the spectrum of these sources with a relativistic reflection component and we employ our model RELXILL_NK to test the Kerr nature of their supermassive black holes. We constrain the Johannsen deformation parameters alpha(13) and alpha(22), in which the Kerr metric is recovered when alpha(13) = alpha(22) = 0. All our measurements are consistent with the hypothesis that the spacetime geometry around these supermassive objects is described by the Kerr solution. For some sources, we obtain quite strong constraints on alpha(13) and alpha(22) when compared to those found in our previous studies. We discuss the systematic uncertainties in our tests and the implications of our results.

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APA:

Tripathi, A., Yan, J., Yang, Y., Yan, Y., Garnham, M., Yao, Y.,... Nampalliwar, S. (2019). Constraints on the Spacetime Metric around Seven "Bare" AGNs Using X-Ray Reflection Spectroscopy. Astrophysical Journal, 874(2). https://dx.doi.org/10.3847/1538-4357/ab0a00

MLA:

Tripathi, Ashutosh, et al. "Constraints on the Spacetime Metric around Seven "Bare" AGNs Using X-Ray Reflection Spectroscopy." Astrophysical Journal 874.2 (2019).

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