Modeling compact binary merger waveforms beyond general relativity

Creators: Bonilla, Gabriel S.; Kumar, Prayush; Teukolsky, Saul A.

Abstract

The parametrized post-Einsteinian framework modifies inspiral waveform models to incorporate effects beyond general relativity (GR). We extend the existing model into the merger-ringdown regime. The modification introduced here adds a single degree of freedom that corresponds to a change in the binary coalescence time. Other merger properties remain as predicted by GR. We discuss parameter estimation with this model, and how it can be used to extract information from beyond-GR waveforms.

Additional Information

© 2023 American Physical Society. We thank Éamonn O'Shea and Masha Okounkova for useful discussions, and Shasvath Kapadia, Daiki Watarai, Swati Singh, and Srashti Goyal for their careful reading of the manuscript. This work was supported in part by the Sherman Fairchild Foundation, and by NSF Grant No. PHY-1912081 at Cornell. This work was also supported in part by NSF Grants No. PHY-1654359 and No. PHY-2208014, by the Dan Black Family Trust, and by Nicholas and Lee Begovich at Cal State Fullerton. P. K. acknowledges support of the Department of Atomic Energy, Government of India, under project no. RTI4001; and by the Ashok and Gita Vaish Early Career Faculty Fellowship at the International Centre for Theoretical Sciences. The authors are grateful for computational resources provided by the LIGO Laboratory and supported by National Science Foundation Grants No. PHY-0757058 and No. PHY-0823459.

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Published - PhysRevD.107.024015.pdf

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