
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
High Energy Physics - Theory, Ernst-Schwarzschild solution, Black holes, magnetised black hole, Astrophysics (astro-ph), FOS: Physical sciences, Equations of motion in general relativity and gravitational theory, General Relativity and Quantum Cosmology (gr-qc), Astrophysics, General Relativity and Quantum Cosmology, High Energy Physics - Theory (hep-th), gravitational lens
High Energy Physics - Theory, Ernst-Schwarzschild solution, Black holes, magnetised black hole, Astrophysics (astro-ph), FOS: Physical sciences, Equations of motion in general relativity and gravitational theory, General Relativity and Quantum Cosmology (gr-qc), Astrophysics, General Relativity and Quantum Cosmology, High Energy Physics - Theory (hep-th), gravitational lens
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