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… 

Mass and spin of Kerr black holes in terms of observational quantities: The dragging effect on the redshift

In this work, we elaborate on the development of a general relativistic formalism that allows one to analytically express the mass and spin parameters of the Kerr black hole in terms of observational

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