45 citations · 287 across the 13 of their papers we have counts for
6 papers · 1 filter
Gravitational memory effects and higher derivative actions
Mahdi Godazgar, George Macaulay, Ali Seraj
We show that charges associated with the internal Lorentz symmetries of general relativity, with higher derivative boundary terms included in the action, capture observable gravita…
Eigenvalue repulsions and quasinormal mode spectra of Kerr-Newman: an extended study
Oscar J. C. Dias, Mahdi Godazgar, Jorge E. Santos
The frequency spectra of the gravito-electromagnetic perturbations of the Kerr-Newman (KN) black hole with the slowest decay rate have been computed recently. It has been found tha…
Eigenvalue repulsions in the quasinormal spectra of the Kerr-Newman black hole
Oscar J. C. Dias, Mahdi Godazgar, Jorge E. Santos +3
We study the gravito-electromagnetic perturbations of the Kerr-Newman (KN) black hole metric and identify the two photon sphere and near-horizon families of quasinormal mod…
Constraints on Kerr-Newman black holes from merger-ringdown gravitational-wave observations
Gregorio Carullo, Danny Laghi, Nathan K. Johnson-McDaniel +4
We construct a template to model the post-merger phase of a binary black hole coalescence in the presence of a remnant charge. We include the quasi-normal modes typically do…
Penrose quasi-local energy and Kerr-Schild metrics
Mahdi Godazgar, Andre Kaderli
Specialising to the case of Kerr-Schild spacetimes, which include the Kerr black hole and gravitational wave solutions, we propose a modification of the Penrose quasi-local energy.…
Algebraic classification of five-dimensional spacetimes using scalar invariants
A. A. Coley, S. Hervik, M. N. Durkee +1
There are a number of algebraic classifications of spacetimes in higher dimensions utilizing alignment theory, bivectors and discriminants. Previous work gave a set of necessary co…