Gravitational Bending of Light Near Compact Objects

@article{Beloborodov2002GravitationalBO,
  title={Gravitational Bending of Light Near Compact Objects},
  author={Andrei M. Beloborodov},
  journal={The Astrophysical Journal Letters},
  year={2002},
  volume={566},
  pages={L85 - L88}
}
  • A. Beloborodov
  • Published 8 January 2002
  • Physics
  • The Astrophysical Journal Letters
A photon emitted near a compact object at an angle α with respect to the radial direction escapes to infinity at a different angle ψ > α. This bending of light is caused by a strong gravitational field. We show that, in a Schwarzschild metric, the effect is described by 1 - cos α = (1 - cos ψ)(1 - rg/R), where R/rg is the emission radius in Schwarzschild units. The formula is approximate, and it applies at R ≥ 2rg only; however, at these radii it has amazing accuracy, fully sufficient in many… 

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