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Singularity-free black holes in conformal gravity: new observational constraints

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arxiv 2003.03738 v1 pith:4LW5G4OX submitted 2020-03-08 gr-qc

Menglei Zhou , Askar B. Abdikamalov , Dimitry Ayzenberg , Cosimo Bambi , Leonardo Modesto , Sourabh Nampalliwar , Yerong Xu This is my paper
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keywords blackconformalfoundgravityholesingularity-freeanalysisbambi
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abstract

We consider the family of singularity-free rotating black hole solutions in Einstein's conformal gravity found in Bambi, Modesto & Rachwal (2017) and we constrain the value of the conformal parameter $L$ from the analysis of a 30 ks NuSTAR observation of the stellar-mass black hole in GS 1354-645 during its outburst in 2015. Our new constraint is much stronger than that found in previous work. Here we obtain $L/M < 0.12$ (99% confidence level, statistical uncertainty only).

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Cited by 3 Pith papers

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  1. Acausal exact vacuum solutions in nonlocal gravity

    gr-qc 2026-05 unverdicted novelty 7.0 of 10

    A subclass of Gödel universes with closed timelike curves are exact vacuum solutions in nonlocal gravity for special nonlocal form factors.

  2. 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.

  3. Acausal exact vacuum solutions in nonlocal gravity

    gr-qc 2026-05 unverdicted novelty 5.0 of 10

    Gödel-type universes with closed timelike curves are exact vacuum solutions in nonlocal gravity for a special class of form factors.

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