Optical caustics of Kerr spacetime: The full structure

  title={Optical caustics of Kerr spacetime: The full structure},
  author={Valerio Bozza},
  journal={Physical Review D},
  • V. Bozza
  • Published 25 June 2008
  • Physics
  • Physical Review D
I present an exhaustive numerical investigation of the optical caustics in gravitational lensing by a spinning black hole for an observer at infinity. Besides the primary caustic, I examine higher order caustics, formed by photons performing one or several loops around the black hole. My investigation covers the whole parameter space, including the black hole spin, its inclination with respect to the line of sight, the source distance, and the caustic order. By comparing my results with the… Expand
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