Dynamics of magnetized particles around Einstein-{\AE}ther black hole with uniform magnetic field

TL;DR

This paper investigates how Einstein-e4ther gravity influences the motion of magnetized particles around black holes in magnetic fields, revealing parameter effects on orbits, energy, and similarities with Kerr black holes.

Contribution

It introduces a detailed analysis of Einstein-e4ther parameters on particle dynamics and compares these effects with rotating Kerr black holes and modified gravity models.

Findings

Einstein-e4ther parameters significantly affect ISCO radii and magnetic field strength.

Black hole behaviors show similarities between Einstein-e4ther and Kerr black holes under certain conditions.

Static e4ther black holes can mimic Schwarzschild black holes in modified gravity.

Abstract

This work is devoted to study the effects of Einstein-\AE ther gravity on the dynamics of magnetized particles orbiting a static, spherically symmetric and uncharged black hole immersed in an external asymptotically uniform magnetic field in both comoving and proper observers frames. The analysis is carried out by varying the free parameters $c_{13}$ and $c_{14}$ of the Einstein-\AE ther theory and noticing their impacts on the particle trajectories, radii of the innermost stable circular orbits (ISCOs), and the amount of center-of-mass energy produced as a result of the collision. The strength of the magnetic field and the location of circular orbits is significantly affected by varying the above free parameters. We have also made detailed comparisons between the effects of parameters of Einstein-\AE ther and spin of rotating Kerr black holes on ISCO followed by magnetized particles and noticed that both black holes depict similar behaviour for suitable values of $c_{13}$, $c_{14}$, spin and the magnetic coupling parameters which provide exactly the same values for the ISCO. Finally, we have analysed the cases when a static \AE ther black hole can be described as Schwarzschild black hole in modified gravity (MOG) with the corresponding values of the parameters of the black holes.