The gravitational wave strain in the characteristic formalism of numerical relativity

Abstract

The extraction of the gravitational wave signal, within the context of a characteristic numerical evolution is revisited. A formula for the gravitational wave strain is developed and tested, and is made publicly available as part of the PITT code within the Einstein Toolkit. Using the new strain formula, we show that artificial non-linear drifts inherent in time integrated waveforms can be reduced for the case of a binary black hole merger configuration. For the test case of a rapidly spinning stellar core collapse model, however, we find that the drift must have different roots.

9 pages, 3 figures

References in corpus (5)

• The Einstein Toolkit: A Community Computational Infrastructure for Relativistic Astrophysics
• Inspiral, merger and ringdown of unequal mass black hole binaries: a multipolar analysis
• Dynamics and Gravitational Wave Signature of Collapsar Formation
• Gravitational Wave Extraction in Simulations of Rotating Stellar Core Collapse
• Strategies for the Characteristic Extraction of Gravitational Waveforms

Cited by in corpus (6)

• Extraction of Gravitational Waves in Numerical Relativity
• Computation of Displacement and Spin Gravitational Memory in Numerical Relativity
• Gravitational waves in a de Sitter universe
• Spectral Cauchy Characteristic Extraction of strain, news and gravitational radiation flux
• Gravitational-wave parameter inference with the Newman-Penrose scalar ${\psi }_4$
• Master equation solutions in the linear regime of characteristic formulation of general relativity