Gravitational wave extraction based on Cauchy-characteristic extraction and characteristic evolution

Abstract

We implement a code to find the gravitational news at future null infinity by using data from a Cauchy code as boundary data for a characteristic code. This technique of Cauchy-characteristic Extraction (CCE) allows for the unambiguous extraction of gravitational waves from numerical simulations.

11 pages, 5 figures; corrections after referee's comments; add section on Teukolsky wave

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• Continuum and Discrete Initial-Boundary-Value Problems and Einstein's Field Equations
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