74 citations · 333 across the 13 of their papers we have counts for
13 papers
Flux-balance laws for spinning bodies under the gravitational self-force
Alexander M. Grant
The motion of an extended, but still weakly gravitating body in general relativity can often be determined by a set of conserved quantities. Much like for geodesic motion, a suffic…
Secondary accretion of dark matter in intermediate mass-ratio inspirals: Dark-matter dynamics and gravitational-wave phase
David A. Nichols, Benjamin A. Wade, Alexander M. Grant
When particle dark matter is bound gravitationally around a massive black hole in sufficiently high densities, the dark matter will affect the rate of inspiral of a secondary compa…
Outlook for detecting the gravitational wave displacement and spin memory effects with current and future gravitational wave detectors
Alexander M. Grant, David A. Nichols
Gravitational wave memory effects arise from non-oscillatory components of gravitational wave signals, and they are predictions of general relativity in the nonlinear regime that h…
Flux-balance laws in scalar self-force theory
Alexander M. Grant, Jordan Moxon
The motion of a radiating point particle can be represented by a series of geodesics whose "constants" of motion evolve slowly with time. The evolution of these constants of motion…
Gravitational-wave energy and other fluxes in ghost-free bigravity
Alexander M. Grant, Alexander Saffer, Leo C. Stein +1
One of the key ingredients for making binary waveform predictions in a beyond-GR theory of gravity is understanding the energy and angular momentum carried by gravitational waves a…
Persistent gravitational wave observables: Curve deviation in asymptotically flat spacetimes
Alexander M. Grant, David A. Nichols
In the first paper in this series, a class of observables that generalized the gravitational wave memory effect were introduced and given the name "persistent gravitational wave ob…
The Wald-Zoupas prescription for asymptotic charges at null infinity in general relativity
Alexander M. Grant, Kartik Prabhu, Ibrahim Shehzad
We use the formalism developed by Wald and Zoupas to derive explicit covariant expressions for the charges and fluxes associated with the Bondi-Metzner-Sachs symmetries at null inf…
A class of conserved currents for linearized gravity in the Kerr spacetime
Alexander M. Grant, Éanna É. Flanagan
We construct a class of conserved currents for linearized gravity on a Kerr background. Our procedure, motivated by the current for scalar fields discovered by Carter (1977), is gi…
Persistent gravitational wave observables: Nonlinear plane wave spacetimes
Éanna É. Flanagan, Alexander M. Grant, Abraham I. Harte +1
In the first paper in this series, we introduced "persistent gravitational wave observables" as a framework for generalizing the gravitational wave memory effect. These observables…
Angular momentum at null infinity in Einstein-Maxwell theory
Béatrice Bonga, Alexander M. Grant, Kartik Prabhu
On Minkowski spacetime, the angular momentum flux through null infinity of Maxwell fields, computed using the stress-energy tensor, depends not only on the radiative degrees of fre…
Conserved currents for electromagnetic fields in the Kerr spacetime
Alexander M. Grant, Éanna É. Flanagan
We construct a variety of conserved currents for test electromagnetic fields on a Kerr background. Our procedure, which involves the symplectic product for electromagnetism and sym…
Persistent gravitational wave observables: general framework
Éanna É. Flanagan, Alexander M. Grant, Abraham I. Harte +1
The gravitational wave memory effect is characterized by the permanent relative displacement of a pair of initially comoving test particles that is caused by the passage of a burst…
Non-conservation of Carter in black hole spacetimes
Alexander Grant, Eanna E. Flanagan
Freely falling point particles in the vicinity of Kerr black holes are subject to a conservation law, that of their Carter constant. We consider the conjecture that this conservati…