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Magnetically charged black holes from non-linear electrodynamics and the Event Horizon Telescope

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arxiv 1912.08231 v2 pith:7M23EN67 submitted 2019-12-17 gr-qc astro-ph.HEhep-th

Alireza Allahyari , Mohsen Khodadi , Sunny Vagnozzi , David F. Mota This is my paper · ORCID
classification gr-qcastro-ph.HEhep-th
keywords blacknledelectrodynamicseventholehorizonmodelmodels
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Non-linear electrodynamics (NLED) theories are well-motivated extensions of QED in the strong field regime, and have long been studied in the search for regular black hole (BH) solutions. We consider two well-studied and well-motivated NLED models coupled to General Relativity: the Euler-Heisenberg model and the Bronnikov model. After carefully accounting for the effective geometry induced by the NLED corrections, we determine the shadows of BHs within these two models. We then compare these to the shadow of the supermassive BH M87* recently imaged by the Event Horizon Telescope collaboration. In doing so, we are able to extract upper limits on the black hole magnetic charge, thus providing novel constraints on fundamental physics from this new extraordinary probe.

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Cited by 10 Pith papers

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    If a black hole's mass grows with cosmic expansion, Hawking evaporation is slowed or reversed, weakening gamma-ray bounds on primordial black holes.

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  3. Regular black holes with Minkowskian cores: causal structure and observational degeneracy

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    Regular black holes with Minkowskian cores constructed by gravitational decoupling produce shadows and accretion-disk images nearly indistinguishable from Kerr/Schwarzschild despite radically different interiors.

  4. Scalarization of Einstein-Euler-Heisenberg black hole with multiple horizons

    gr-qc 2026-07 conditional novelty 5.0 of 10

    Stable, positive-mass scalarized EEH black holes exist only in an intermediate primary-scalar-charge window for low/cold horizons and above a lower bound for hot horizons.

  5. Negative potential-induced scalarization in the Einstein-Euler-Heisenberg black hole

    gr-qc 2025-08 conditional novelty 5.0 of 10

    A single branch of scalarized Einstein-Euler-Heisenberg black holes is constructed numerically, found to be thermodynamically disfavored and dynamically unstable for all magnetic charges.

  6. Shadow constraints of charged black hole with scalar hair and gravitational waves from extreme mass ratio inspirals

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    EHT shadow data constrain the EMCS black hole charge and scalar hair to about 0.1 and 0.01 levels, while LISA EMRI waveforms could reach 0.01 and 0.0001 levels.

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