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

Understand

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.