Pith. sign in

REVIEW 5 cited by

Constraints on the spacetime metric around seven "bare" AGNs using X-ray reflection spectroscopy

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 1901.03064 v2 pith:T3ASR7GC submitted 2019-01-10 gr-qc astro-ph.HE

Ashutosh Tripathi , Jinli Yan , Yuchan Yang , Yunfeng Yan , Marcus Garnham , Yu Yao , Songcheng Li , Ziyu Ding
show 7 more authors
Askar B. Abdikamalov Dimitry Ayzenberg Cosimo Bambi Thomas Dauser Javier A. Garcia Jiachen Jiang Sourabh Nampalliwar
This is my paper · ORCID
classification gr-qcastro-ph.HE
keywords alphakerraroundbareconstraintsmetricreflectionseven
verification ladder T0 review T1 audit T2 compute T3 formal

Signed reviews

No signed human review yet.

0 comments
abstract

We present the study of a sample of seven "bare" active galactic nuclei (AGN) 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.

Discussion (0). Continue with ORCID to comment.

Forward citations

Cited by 5 Pith papers

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

  1. Testing non-circular black hole spacetime with X-ray reflection

    gr-qc 2026-02 conditional novelty 6.0 of 10

    X-ray reflection data for EXO 1846–031 cannot distinguish the non-circular deformation parameter ℓ_NP from zero, remaining consistent with the Kerr hypothesis.

  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. Testing black hole metrics with binary black hole inspirals

    gr-qc 2025-10 unverdicted novelty 3.0 of 10

    Constraints on deviations from Kerr black hole metrics are derived from binary black hole inspiral waveforms modeled with effective one-body methods and analyzed via the parameterized post-Einsteinian framework.

  4. 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.

  5. Testing General Relativity with Black Holes

    gr-qc 2025-08 unverdicted novelty 1.0 of 10

    A status review of X-ray tests of the Kerr black hole hypothesis, concluding that current data are consistent with General Relativity, plus a speculative interstellar probe proposal.

Pith tools