Polarized image of a rotating black hole in Scalar-Tensor-Vector-Gravity theory

Abstract

The polarized images of a synchrotron emitting ring are studied in the spacetime of a rotating black hole in the Scalar-Tensor-Vector-Gravity (STVG) theory. The black hole owns an additional dimensionless MOG parameter described its deviation from Kerr black hole. The effects of the MOG parameter on the observed polarization vector and Strokes $Q-U$ loops depend heavily on the spin parameter, the magnetic field configuration, the fluid velocity and the observation inclination angle. For the fixed MOG parameter, the changes of the polarization vector in the image plane are similar to those in the Kerr black hole case. The comparison of the polarization images between Kerr-MOG black hole and M87* implies that there remains some possibility for the STVG-MOG theory.

arXiv comment20 pages, 13 figures, Accepted for publication in Astrophys. J

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• Light rings and shadows of static black holes in effective quantum gravity II: A new solution without Cauchy horizons
• Harvesting energy driven by Comisso-Asenjo process from Kerr-MOG black holes
• Gravito-electromagnetic perturbations of MOG black holes with a cosmological constant: Quasinormal modes and Ringdown waveforms
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• Constraints on Power Law and Exponential models in $f(Q)$ Gravity
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• Gravitational Faraday rotation of light propagation in the Kerr-Newman-Taub-NUT space-time
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• Polarization Signatures of Rotating Black Holes in Perfect Fluid Dark Matter Spacetimes
• Relativistic Thermal Emission from Accretion Disks in Kerr-MOG Spacetimes