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Extending gravitational wave extraction using Weyl characteristic fields

Iozzo, Dante A. B. and Boyle, Michael and Deppe, Nils and Moxon, Jordan and Scheel, Mark A. and Kidder, Lawrence E. and Pfeiffer, Harald P. and Teukolsky, Saul A. (2021) Extending gravitational wave extraction using Weyl characteristic fields. Physical Review D, 103 (2). Art. No. 024039. ISSN 2470-0010. doi:10.1103/physrevd.103.024039.

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We present a detailed methodology for extracting the full set of Newman-Penrose Weyl scalars from numerically generated spacetimes without requiring a tetrad that is completely orthonormal or perfectly aligned to the principal null directions. We also describe how to implement an extrapolation technique for computing the Weyl scalars’ contribution at asymptotic null infinity in postprocessing. These methods have been used to produce Ψ₄ and ℎ waveforms for the Simulating eXtreme Spacetimes (SXS) waveform catalog and now have been expanded to produce the entire set of Weyl scalars. These new waveform quantities are critical for the future of gravitational wave astronomy in order to understand the finite-amplitude gauge differences that can occur in numerical waveforms. We also present a new analysis of the accuracy of waveforms produced by the Spectral Einstein Code. While ultimately we expect Cauchy characteristic extraction to yield more accurate waveforms, the extraction techniques described here are far easier to implement and have already proven to be a viable way to produce production-level waveforms that can meet the demands of current gravitational-wave detectors.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Iozzo, Dante A. B.0000-0002-7244-1900
Boyle, Michael0000-0002-5075-5116
Deppe, Nils0000-0003-4557-4115
Moxon, Jordan0000-0001-9891-8677
Scheel, Mark A.0000-0001-6656-9134
Kidder, Lawrence E.0000-0001-5392-7342
Pfeiffer, Harald P.0000-0001-9288-519X
Teukolsky, Saul A.0000-0001-9765-4526
Alternate Title:Improving Gravitational Wave Extraction Using Weyl Characteristic Fields
Additional Information:© 2021 American Physical Society. (Received 29 October 2020; accepted 22 December 2020; published 20 January 2021) We are grateful to Will Throwe, Eamonn O’Shea, Cristóbal Armaza, and Gabriel Bonilla for insightful discussions. Computations were performed with the High Performance Computing Center and the Wheeler cluster at Caltech. This work was supported in part by the Sherman Fairchild Foundation and by NSF Grants No. PHY-2011961, No. PHY-2011968, and No. OAC-1931266 at Caltech and NSF Grants No. PHY-1912081 and No. OAC-1931280 at Cornell.
Funding AgencyGrant Number
Sherman Fairchild FoundationUNSPECIFIED
Issue or Number:2
Record Number:CaltechAUTHORS:20210121-101410882
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107628
Deposited By: George Porter
Deposited On:21 Jan 2021 19:04
Last Modified:16 Nov 2021 19:04

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