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[ascl:1011.015] Geokerr: Computing Photon Orbits in a Kerr Spacetime

Relativistic radiative transfer problems require the calculation of photon trajectories in curved spacetime. Programmed in Fortran, Geokerr uses a novel technique for rapid and accurate calculation of null geodesics in the Kerr metric. The equations of motion from the Hamilton-Jacobi equation are reduced directly to Carlson's elliptic integrals, simplifying algebraic manipulations and allowing all coordinates to be computed semi-analytically for the first time.

Code site:
http://faculty.washington.edu/agol/geokerr/index.html
Appears in:
http://adsabs.harvard.edu/abs/2009ApJ...696.1616D
Bibcode:
2010ascl.soft11015D

ascl:1011.015
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