Lensing simulations by Taylor expansion — not so inefficient after all

  title={Lensing simulations by Taylor expansion — not so inefficient after all},
  author={Sigurd Kirkevold Naess and T. Louis},
  journal={Journal of Cosmology and Astroparticle Physics},
  • S. Naess, T. Louis
  • Published 2013
  • Physics
  • Journal of Cosmology and Astroparticle Physics
Cosmic Microwave Background lensing simulation by Taylor expansion has long been considered impractical due to slow convergence, but a recent flat-sky implementation shows that a simple trick eliminates this problem, making Taylor lensing a fast and simple lensing algorithm for the flat sky. Here we generalize the method to the full sky, and study its convergence and performance relative to a commonly used numerical code, Lenspix, with extensive benchmarks of both. Compared to the flat sky case… Expand
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