Kerr Spherical Photon Orbits
Interactive tool for visualizing spherical/circular photon orbits in Kerr
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qnm talk (and notebook) at the BHPToolkit spring 2020 workshop
Last week I gave an invited talk at the Spring 2020 workshop of the Black Hole Perturbation Toolkit (BHPToolkit). The BHPToolkit is a collection of open sou...
Numerical relativity simulation of GW150914 beyond general relativity
The first astrophysically-relevant numerical simulation of merging black holes in a higher-curvature theory beyond GR.
Notes: Generalized harmonic form of Einstein’s equations from a gauge-fixed action
The generalized harmonic formulation can be derived by adding a gauge-fixing term to the Einstein-Hilbert action
Poincaré section clicker for the double pendulum
Interactive toy for understanding Poincaré sections and chaos
Location of the last stable orbit in Kerr spacetime
The dividing line between bound and plunging orbits is an algebraic variety