The new discontinuous Galerkin methods based numerical relativity program Nmesh [PDF]
Classical and quantum gravity, 2022 Interpreting gravitational wave observations and understanding the physics of astrophysical compact objects such as black holes or neutron stars requires accurate theoretical models.
W. Tichy +4 more
semanticscholar +1 more source
GRChombo: An adaptable numerical relativity code for fundamental physics [PDF]
Journal of Open Source Software, 2021 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.
T. Andrade +31 more
semanticscholar +1 more source
Numerical Relativity for Horndeski Gravity [PDF]
International Journal of Modern Physics D, 2022 We present an overview of recent developments in the numerical solution of Horndeski gravity theories, which are the class of all scalar-tensor theories of gravity that have second order equations of motion.
Justin L. Ripley
semanticscholar +1 more source
Implementation of advanced Riemann solvers in a neutrino-radiation magnetohydrodynamics code in numerical relativity and its application to a binary neutron star merger [PDF]
Physical Review D, 2022 We implement advanced Riemann solvers HLLC and HLLD [1, 2] together with an advanced constrained transport scheme [3] in a numerical-relativity neutrino-radiation magnetohydrodynamics code.
K. Kiuchi +3 more
semanticscholar +1 more source
Gravitational wave inference on a numerical-relativity simulation of a black hole merger beyond general relativity [PDF]
Physical Review D, 2022 We apply common gravitational wave inference procedures on binary black hole merger waveforms beyond general relativity. We consider dynamical Chern-Simons gravity, a modified theory of gravity with origins in string theory and loop quantum gravity. This
M. Okounkova +3 more
semanticscholar +1 more source
Lessons for adaptive mesh refinement in numerical relativity [PDF]
Classical and quantum gravity, 2021 We demonstrate the flexibility and utility of the Berger–Rigoutsos adaptive mesh refinement (AMR) algorithm used in the open-source numerical relativity (NR) code GRChombo for generating gravitational waveforms from binary black-hole (BH) inspirals, and ...
Miren Radia +9 more
semanticscholar +1 more source
Primordial black hole formation with full numerical relativity [PDF]
Journal of Cosmology and Astroparticle Physics, 2021 We study the formation of black holes from subhorizon and superhorizon perturbations in a matter dominated universe with 3+1D numerical relativity simulations.
Eloy de Jong +2 more
semanticscholar +1 more source
Numerical relativity simulation of GW150914 beyond general relativity [PDF]
, 2020 We produce the first astrophysically-relevant numerical binary black hole gravitational waveform in a higher-curvature theory of gravity beyond general relativity.
Moxon, Jordan +4 more
core +2 more sources
Fixing the BMS frame of numerical relativity waveforms [PDF]
Physical Review D, 2021 Understanding the Bondi-Metzner-Sachs (BMS) frame of the gravitational waves produced by numerical relativity is crucial for ensuring that analyses on such waveforms are performed properly. It is also important that models are built from waveforms in the
Keefe Mitman +11 more
semanticscholar +1 more source
Continuity equations for general matter: applications in numerical relativity [PDF]
Classical and quantum gravity, 2021 Due to the absence of symmetries under time and spatial translations in a general curved spacetime, the energy and momentum of matter is not conserved as it is in flat space. This means, for example, that the flux of matter energy through a surface is in
K. Clough
semanticscholar +1 more source