668 citations · 3.4k across the 62 of their papers we have counts for
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Critical Exponents of Extremal Kerr Perturbations
Samuel E. Gralla, Peter Zimmerman
We show that scalar, electromagnetic, and gravitational perturbations of extremal Kerr black holes are asymptotically self-similar under the near-horizon, late-time scaling symmetr…
Observational Signature of High Spin at the Event Horizon Telescope
Samuel E. Gralla, Alexandru Lupsasca, Andrew Strominger
We analytically compute the observational appearance of an isotropically emitting point source on a circular, equatorial orbit near the horizon of a rapidly spinning black hole. Th…
On the Ambiguity in Relativistic Tidal Deformability
Samuel E. Gralla
The LIGO collaboration recently reported the first gravitational-wave constraints on the tidal deformability of neutron stars. I discuss an inherent ambiguity in the notion of rela…
Inclined Pulsar Magnetospheres in General Relativity: Polar Caps for the Dipole, Quadrudipole and Beyond
Samuel E. Gralla, Alexandru Lupsasca, Alexander Philippov
In the canonical model of a pulsar, rotational energy is transmitted through the surrounding plasma via two electrical circuits, each connecting to the star over a small region kno…