Redshift of light emitted by particles orbiting a black hole immersed in a strong magnetic field

@article{Lopez2021RedshiftOL,
  title={Redshift of light emitted by particles orbiting a black hole immersed in a strong magnetic field},
  author={L. A. L'opez and Nora Bret{\'o}n},
  journal={Astrophysics and Space Science},
  year={2021},
  volume={366}
}
In this paper we analyze the frequency shifts of the light emitted by particles describing stable circular geodesics around a static black hole immersed in an external magnetic field of arbitrary strength. This system is represented by the Ernst solution of the Einstein-Maxwell equations. The presence of the magnetic field and its magnitude affects both the geodesics and the red-blueshifts of the light emitted by neutral or charged particles orbiting the black hole. When the magnetic field is… 
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