504 citations · 2.7k across the 41 of their papers we have counts for
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hep-th2017★ 27 cited
invariant fluid dynamics at null infinity
Robert F. Penna
We revisit the boundary dynamics of asymptotically flat, three dimensional gravity. The boundary is governed by a momentum conservation equation and an energy conservation equation…
gr-qc2017★ 3 cited
Strong-field tidal distortions of rotating black holes: III. Embeddings in hyperbolic 3-space
Robert F. Penna, Scott A. Hughes, Stephen O'Sullivan
In previous work, we developed tools for quantifying the tidal distortion of a black hole's event horizon due to an orbiting companion. These tools use techniques which require lar…
hep-th2017★ 39 cited
Near-horizon BMS symmetries as fluid symmetries
Robert F. Penna
The Bondi-van der Burg-Metzner-Sachs (BMS) group is the asymptotic symmetry group of asymptotically flat gravity. Recently, Donnay et al. have derived an analogous symmetry group a…