What is Krang.jl?

Kerr Raytracer for Analytic Null Geodesics (Krang) is a raytracing code for geometries that are embedded in the Kerr spacetime. Krang solves the Kerr geodesic problem using analytic solutions derived from the Hamilton-Jacobi formalism. This choice makes the code efficient and accurate, and is ideal for decomposing images into the characteristic sub-images which manifest from strong gravitational lensing.

Philosophy

Krang operates by ray tracing 'meshes' which can be thought of as a geometry that presents some sort of physics material. The meshes are viewed by cameras that are sensitive to particular observables (e.g.intensity and polarization).

Examples

Some pedagogical example usage of the raytracing code in the Examples section. These examples primarily use CairoMakie and GLMakie for plotting. You can install these by enering the julia package mode and running:

pkg> add CairoMakie GLMakie