20 citations · 22 across the 8 of their papers we have counts for
8 papers
Nonlinear evolution in Galileon EFTs: Regularization and screening
Farid Thaalba, Aaron Held, Ramiro Cayuso +1
In a scalar effective field theory (EFT) with Galileon symmetry, we distinguish the strong-field expansion from the derivative expansion and study spherically symmetric classical n…
Photon Ring Astrometry I: A Simple Spin Measurement Technique for High-Resolution Images of M87*
Delilah E. A. Gates, Dominic O. Chang, Aaron Held +1
The supermassive black hole M87* is a target for future horizon-scale imaging that will resolve the first lensed () sub-image of the photon ring. In this work, we iden…
Spherically symmetric solutions in quasi-local Einstein-Weyl gravity
Johanna Borissova, Breno L. Giacchini, Aaron Held
Quantum-gravitational effective actions with higher-derivative and non-local operators are expected to regularize the singularities of general relativity. Here we focus on quasi-lo…
Global stability of ghostly field theories: Classical scattering in dimensions
Aaron Held
We review results on small-data global stability and highlight their applicability to classical interacting scalar fields with opposite-sign kinetic terms (ghosts). Further, we pre…
Ghostly interactions in (1+1) dimensional classical field theory
Cédric Deffayet, Aaron Held, Shinji Mukohyama +1
We investigate the classical stability of two coupled scalar fields with opposite-sign kinetic terms evolving in 1+1 dimensional Minkowski spacetime. In the first part, we characte…
Black-hole binaries and waveforms in Quadratic Gravity
Aaron Held, Hyun Lim
We report on the first numerical-relativity simulations of black-hole binaries that deviate from General Relativity due to quadratic-curvature corrections. Said theory of Quadratic…
Well-posed initial value formulation of general effective field theories of gravity
Pau Figueras, Aaron Held, Áron D. Kovács
We provide a proof that all polynomial higher-derivative effective field theories of vacuum gravity admit a well-posed initial value formulation when augmented by suitable regulari…
A Lensing-Band Approach to Spacetime Constraints
Alejandro Cárdenas-Avendaño, Aaron Held
General relativity's prediction that all black holes are described by the Kerr metric, irrespective of their size, can now be empirically tested using electromagnetic observations…