Kerr Spherical Photon Orbits
Interactive tool for visualizing spherical/circular photon orbits in Kerr
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Measuring stochastic gravitational-wave energy beyond general relativity
Gravity theories beyond general relativity (GR) can change the properties of gravitational waves: their polarizations, dispersion, speed, and, importantly, e...
Black hole scalar charge from a topological horizon integral in Einstein-dilaton-Gauss-Bonnet gravity
In theories of gravity that include a scalar field, a compact object’s scalar charge is a crucial quantity since it controls dipole radiation, which can be s...
(Notes) When is a metric conformal to Ricci-flat?
Integrability conditions when trying to solve for a conformal factor
Black-hole kicks from numerical-relativity surrogate models
Modeling black holes’ kicks directly from numerical relativity
Deformation of extremal black holes from stringy interactions
Finding the shape of extremal black holes in beyond-GR theories