Circular orbits and polarized images of charged particles orbiting Kerr black hole with a weak magnetic field

Abstract

In this work, we study circular motions of charged particles and their polarized images around the Kerr black hole immersed in a weak magnetic field. We pay special attention to the case that both the magnetic field and the charge-to-mass ratio are not big, thus the effective potential along the radial motion reduce to a cubic form approximately so that we can express the radius of the innermost stable circular orbit analytically in terms of the energy and angular momentum of charged particles. Moreover, we computed the polarized synchrotron radiations of these particles and obtained the polarized images semi-analytically for various spins, observational angles and prograde and retrograde orbits. In particular, We find that these parameters have significant impacts on the polarization rotation and the magnitude of the polarization flux.

21 pages,5 figuers; major revision, published version matched

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Cited by in corpus (7)

• Circular orbits and thin accretion disk around a quantum corrected black hole
• How Spatially Resolved Polarimetry Informs Black Hole Accretion Flow Models
• Radiating particle in the vicinity of the weakly charged Schwarzschild black hole
• Particle Dynamics on Test Papapetrou Fields of Vacuum Spacetimes
• Radiative properties of thin accretion disks around rotating short-hairy black holes
• The Repulsive Effect of Covariant Effective Quantum Gravity
• Chaotic dynamics of charged particles near weakly magnetized black holes in Einstein-ModMax Theory