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Numerical Methods in Gravitational Lensing

Matthias Bartelmann
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Abstract

Most problems in gravitational lensing require numerical solutions. The most frequent types of problems are (1) finding multiple images of a single source and classifying the images according to their properties like magnification or distortion; (2) propagating light rays through large cosmological simulations; and (3) reconstructing mass distributions from their tidal field. This lecture describes methods for solving such problems. Emphasis is put on using adaptive-grid methods for finding images, issues of spatial resolution and reliability of statistics for weak lensing by large-scale structures, and methodical questions related to shear-inversion techniques.

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Matthias Bartelmann. 2003-04-09. Numerical Methods in Gravitational Lensing. https://arxiv.org/abs/astro-ph/0304162

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