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Image features of spinning regular black holes based on a locality principle

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arxiv 2103.07473 v1 pith:FPZKH7EN submitted 2021-03-12 gr-qc astro-ph.HE

Astrid Eichhorn , Aaron Held This is my paper
classification gr-qcastro-ph.HE
keywords blackfeaturesholeslocalityprincipleregularimagespacetimes
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To understand the true nature of black holes, fundamental theoretical developments should be linked all the way to observational features of black holes in their natural astrophysical environments. Here, we take several steps to establish such a link. We construct a family of spinning, regular black-hole spacetimes based on a locality principle for new physics and analyze their shadow images. We identify characteristic image features associated to regularity (increased compactness and relative stretching) and to the locality principle (cusps and asymmetry) that persist in the presence of a simple analytical disk model. We conjecture that these occur as universal features of distinct classes of regular black holes based on different sets of construction principles for the corresponding spacetimes.

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Cited by 3 Pith papers

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

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    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.

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    gr-qc 2022-05 conditional novelty 5.0 of 10

    EHT observations of Sgr A* constrain deviations from GR black hole solutions including regular BHs, string-inspired spacetimes, and BH mimickers, with some limits exceeding cosmological bounds.

  3. Astrophysical environment around a black hole in the braneworld and its optical signatures

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    Braneworld quadratic and nonlocal corrections weaken gravity in anisotropic Einstein-cluster environments around black holes, blocking horizon formation and shifting Einstein-ring and shadow radii in ways that may con...

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