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

Gravitational wave extraction based on Cauchy-characteristic extraction and characteristic evolution
Gravitational wave extraction based on Cauchy-characteristic extraction and characteristic evolution
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. We first test the technique on non-radiative spacetimes: Minkowski spacetime, perturbations of Minkowski spacetime and static black hole spacetimes in various gauges. We show the convergence and limitations of the algorithm and illustrate its success in cases where other wave extraction methods fail. We further apply our techniques to a standard radiative test case for wave extraction, a linearized Teukolsky wave, presenting our results in comparison to the Zerilli technique, and we argue for the advantages of our method of extraction.
0264-9381
5089-5107
Babiuc, Maria
a306a617-4bfb-468f-ade9-f45f0670a682
Szilágyi, Béla
14d0cc49-5f77-4c5e-9eac-2cf64f75ffdd
Hawke, Ian
fc964672-c794-4260-a972-eaf818e7c9f4
Zlochower, Yosef
3d380457-0437-4f32-9b35-2e4c27fa519c
Babiuc, Maria
a306a617-4bfb-468f-ade9-f45f0670a682
Szilágyi, Béla
14d0cc49-5f77-4c5e-9eac-2cf64f75ffdd
Hawke, Ian
fc964672-c794-4260-a972-eaf818e7c9f4
Zlochower, Yosef
3d380457-0437-4f32-9b35-2e4c27fa519c

Babiuc, Maria, Szilágyi, Béla, Hawke, Ian and Zlochower, Yosef (2005) Gravitational wave extraction based on Cauchy-characteristic extraction and characteristic evolution. Classical and Quantum Gravity, 22 (23), 5089-5107. (doi:10.1088/0264-9381/22/23/011).

Record type: Article

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. We first test the technique on non-radiative spacetimes: Minkowski spacetime, perturbations of Minkowski spacetime and static black hole spacetimes in various gauges. We show the convergence and limitations of the algorithm and illustrate its success in cases where other wave extraction methods fail. We further apply our techniques to a standard radiative test case for wave extraction, a linearized Teukolsky wave, presenting our results in comparison to the Zerilli technique, and we argue for the advantages of our method of extraction.

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Published date: 2005

Identifiers

Local EPrints ID: 29321
URI: https://eprints.soton.ac.uk/id/eprint/29321
ISSN: 0264-9381
PURE UUID: eae9cce1-3644-4b1b-a9c3-41cd0e45163e
ORCID for Ian Hawke: ORCID iD orcid.org/0000-0003-4805-0309

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Date deposited: 11 May 2006
Last modified: 06 Jun 2018 12:42

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