Abstract

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 GRChombo uses standard techniques in NR, it focusses on applications in theoretical physics where adaptability, both in terms of grid structure, and in terms of code modification, are key drivers.

Highlights

  • More detections have since been made by the Advanced LIGO/Virgo network

  • Strong gravity regimes are described by the Einstein Field Equation (EFE) of General Relativity (Einstein, 1916)

  • The canonical example of this is the simulation of two black holes in orbit around each other, which permits extraction of the gravitational wave signal produced during the merger

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Summary

Summary

The 2015 detection of gravitational waves (GWs) from a binary black hole merger Where gμν is the gravitational metric describing spacetime distances, R and Rμν are related to its second derivatives in space and time, and Tμν is the stress-energy tensor of any matter or fields present. Given that gμν is symmetric in its indices, this gives a set of ten coupled nonlinear partial differential equations, sourced by the stress-energy of any matter or fields present in the spacetime. The canonical example of this is the simulation of two black holes in orbit around each other, which permits extraction of the gravitational wave signal produced during the merger Such numerical results have been instrumental in discovering signals in the noisy LIGO/VIRGO detector data, as well as confirming the predictions of GR to a high precision in the strong field regime Whilst GRChombo uses standard techniques in NR, it focusses on applications in theoretical physics where adaptability, both in terms of grid structure, and in terms of code modification, are key drivers

Key features of GRChombo
Statement of Need
Key research projects using GRChombo
Full Text
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