359 citations · 2.2k across the 49 of their papers we have counts for
10 papers · 1 filter
Black hole merger simulations in wave dark matter environments
Jamie Bamber, Josu C. Aurrekoetxea, Katy Clough +1
The interaction of binary black hole mergers with their environments can be studied using numerical relativity simulations. These start only a short finite time before merger, at w…
Well-posedness of the four-derivative scalar-tensor theory of gravity in singularity avoiding coordinates
Llibert Aresté Saló, Katy Clough, Pau Figueras
We show that the most general scalar-tensor theory of gravity up to four derivatives in dimensions is well-posed in a modified version of the CCZ4 formulation of the Einstein…
The Gravitational Afterglow of Boson Stars
Robin Croft, Thomas Helfer, Bo-Xuan Ge +5
In this work we study the long-lived post-merger gravitational wave signature of a boson-star binary coalescence. We use full numerical relativity to simulate the post-merger and t…
CTTK: A new method to solve the initial data constraints in numerical relativity
Josu C. Aurrekoetxea, Katy Clough, Eugene A. Lim
In numerical relativity simulations with non-trivial matter configurations, one must solve the Hamiltonian and momentum constraints of the ADM formulation for the metric variables…
New Horizons for Fundamental Physics with LISA
K. G. Arun, Enis Belgacem, Robert Benkel +138
The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders about the fundamental theory of nature at play in the extreme gravity regime, where the gravitatio…
Where is the ringdown? Reconstructing quasinormal modes from dispersive waves
Josu C. Aurrekoetxea, Pedro G. Ferreira, Katy Clough +2
We study the generation and propagation of gravitational waves in scalar-tensor gravity using numerical relativity simulations of scalar field collapses beyond spherical symmetry.…
Cosmology with the Laser Interferometer Space Antenna
Pierre Auclair, David Bacon, Tessa Baker +177
The Laser Interferometer Space Antenna (LISA) has two scientific objectives of cosmological focus: to probe the expansion rate of the universe, and to understand stochastic gravita…
The problem with Proca: ghost instabilities in self-interacting vector fields
Katy Clough, Thomas Helfer, Helvi Witek +1
Massive vector fields feature in several areas of particle physics, e.g., as carriers of weak interactions, dark matter candidates, or as an effective description of photons in a p…
GRChombo: An adaptable numerical relativity code for fundamental physics
Tomas Andrade, Llibert Areste Salo, Josu C. Aurrekoetxea +29
GRChombo is an open-source code for performing Numerical Relativity time evolutions, built on top of the publicly available Chombo software for the solution of PDEs. Whilst GRChomb…
Superradiance in massive vector fields with spatially varying mass
Zipeng Wang, Thomas Helfer, Katy Clough +1
Superradiance is a process by which massive bosonic particles can extract energy from spinning black holes, leading to the build up of a "cloud" if the particle has a Compton wavel…