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Blandford-Znajek jets in MOdified Gravity

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arxiv 2307.06878 v2 pith:WDGLJUUM submitted 2023-07-13 gr-qc astro-ph.HEhep-th

Blandford-Znajek jets in MOdified Gravity

classification gr-qc astro-ph.HEhep-th
keywords blackgravityfoundholesmodifiedadditionallowanalytic
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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General relativity (GR) will be imminently challenged by upcoming experiments in the strong gravity regime, including those testing the energy extraction mechanisms for black holes. Motivated by this, we explore magnetospheric models and black hole jet emissions in MOdified Gravity (MOG) scenarios. Specifically, we construct new power emitting magnetospheres in a Kerr-MOG background which are found to depend non-trivially on the MOG deformation parameter. This may allow for high-precision tests of GR. In addition, a complete set of analytic solutions for vacuum magnetic field configurations around static MOG black holes are explicitly derived, and found to comprise exclusively Heun polynomials.

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  1. Universality of the Blandford-Znajek emission in stationary and axisymmetric spacetimes

    gr-qc 2026-02 conditional novelty 7.0

    The Blandford-Znajek jet luminosity is universal (∝Ω_h²) at leading order across parametric black-hole spacetimes and spacetime-dependent at next order, breaking the low-spin degeneracy for rapidly rotating holes.