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Bumblebee black holes in light of Event Horizon Telescope observations

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arxiv 2302.05671 v1 pith:XKGLQQ6A submitted 2023-02-11 gr-qc astro-ph.GA

classification gr-qcastro-ph.GA
keywords theoryblack-holebumblebeeeventhorizonobservationssolutionstelescope
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We report the existence of novel static spherical black-hole solutions in a vector-tensor gravitational theory called the bumblebee gravity model which extends the Einstein-Maxwell theory by allowing the vector to nonminimally couple to the Ricci curvature tensor. A test of the solutions in the strong-field regime is performed for the first time using the recent observations of the supermassive black-hole shadows in the galaxy M87 and the Milky Way from the Event Horizon Telescope Collaboration. The parameter space is found largely unexcluded and more experiments are needed to fully bound the theory.

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Cited by 3 Pith papers

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

  1. Black holes and neutron stars in massive Hellings-Nordtvedt theory

    gr-qc 2026-05 unverdicted novelty 7.0 of 10

    In massive Hellings-Nordtvedt theory, a nonzero vector vacuum asymptotically forbids both curvature-vector couplings at once, and the A²R sector yields Schwarzschild-like black holes plus neutron stars that can deviat...

  2. A no-go theorem in bumblebee vector-tensor cosmology

    hep-th 2025-09 conditional novelty 6.0 of 10

    Bumblebee gravity with non-minimal couplings is healthy only under the degeneracy σ=-ξ/2, which fixes the potential and yields a stealth de Sitter solution with scalar sound speed squared ≈1/6.

  3. Perturbative black-hole and horizon solutions in gravity with explicit spacetime-symmetry breaking

    gr-qc 2024-11 conditional novelty 6.0 of 10

    New perturbative black hole solutions in an explicit spacetime-symmetry-breaking gravity EFT, with derived observables including three-horizon metrics when two coefficients are active.

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