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BMS invariance and the membrane paradigm
Robert F. Penna
The Bondi-van der Burg-Metzner-Sachs (BMS) group is the asymptotic symmetry group of asymptotically flat spacetime. It is infinite dimensional and entails an infinite number of con…
Strong-field tidal distortions of rotating black holes: II. Horizon dynamics from eccentric and inclined orbits
Stephen O'Sullivan, Scott A. Hughes
In a previous paper, we developed tools for studying the horizon geometry of a Kerr black hole that is tidally distorted by a binary companion using techniques that require large m…
Energy extraction from boosted black holes: Penrose process, jets, and the membrane at infinity
Robert F. Penna
Numerical simulations indicate that black holes carrying linear momentum and/or orbital momentum can power jets. The jets extract the kinetic energy stored in the black hole's moti…
Black hole jet power from impedance matching
Robert F. Penna
Black hole jet power depends on the angular velocity of magnetic field lines, . Force-free black hole magnetospheres typically have , where is the a…