Magnetized black hole as a gravitational lens
Abstract
Description
We use the Ernst-Schwarzschild solution for a black hole immersed in a uniform magnetic field to estimate corrections to the bending angle and time delay due-to presence of weak magnetic fields in galaxies and between galaxies, and also due-to influence of strong magnetic field near supermassive black holes. The magnetic field creates a kind of confinement in space, that leads to increasing of the bending angle and time delay for a ray of light propagating in the equatorial plane.
5 pages, 2 figures, to be published in Phys. Lett. B, references added
5 pages, 2 figures, to be published in Phys. Lett. B, references added