## Kerr Spherical Photon Orbits

Interactive tool for visualizing spherical/circular photon orbits in Kerr

Interactive tool for visualizing spherical/circular photon orbits in Kerr

The generalized harmonic formulation can be derived by adding a gauge-fixing term to the Einstein-Hilbert action

Interactive toy for understanding Poincaré sections and chaos

The dividing line between bound and plunging orbits is an algebraic variety

The first astrophysically-relevant numerical simulation of merging black holes in a higher-curvature theory beyond GR.

qnm is an open-source Python package for computing the Kerr quasinormal mode frequencies, angular separation constants, and spherical-spheroidal mixing coeff...