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https://hdl.handle.net/10316/112228
Title: | Worldtube excision method for intermediate-mass-ratio inspirals: scalar-field model in 3+1 dimensions | Authors: | Wittek, Nikolas A. Dhesi, Mekhi Barack, Leor Pfeiffer, Harald P. Pound, Adam Rüter, Hannes R. Bonilla, Marceline S. Deppe, Nils Kidder, Lawrence E. Kumar, Prayush Scheel, Mark A. Throwe, William Vu, Nils L. |
Keywords: | General Relativity and Quantum Cosmology | Issue Date: | 11-Apr-2023 | Publisher: | American Physical Society | Project: | UID/04564/2021 UIDB/04564/2020 UIDP/04564/2020 EXPL/FIS-AST/0735/2021 |
Serial title, monograph or event: | Physical Review D | Volume: | 108 | Issue: | 2 | Abstract: | Binary black hole simulations become increasingly more computationally expensive with smaller mass ratios, partly because of the longer evolution time, and partly because the lengthscale disparity dictates smaller time steps. The program initiated by Dhesi et al. (arXiv:2109.03531) explores a method for alleviating the scale disparity in simulations with mass ratios in the intermediate astrophysical range ($10^{-4} \lesssim q \lesssim 10^{-2}$), where purely perturbative methods may not be adequate. A region ("worldtube") much larger than the small black hole is excised from the numerical domain, and replaced with an analytical model approximating a tidally deformed black hole. Here we apply this idea to a toy model of a scalar charge in a fixed circular geodesic orbit around a Schwarzschild black hole, solving for the massless Klein-Gordon field. This is a first implementation of the worldtube excision method in full 3+1 dimensions. We demonstrate the accuracy and efficiency of the method, and discuss the steps towards applying it for evolving orbits and, ultimately, in the binary black-hole scenario. Our implementation is publicly accessible in the SpECTRE numerical relativity code. | Description: | 19 pages, 10 figures; typos corrected, citations added | URI: | https://hdl.handle.net/10316/112228 | ISSN: | 2470-0010 2470-0029 |
DOI: | 10.1103/PhysRevD.108.024041 | Rights: | openAccess |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais I&D CFis - Artigos em Revistas Internacionais |
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Worldtube-excision-method-for-intermediatemassratio-inspirals-Scalarfield-model-in-31-dimensionsPhysical-Review-D.pdf | 2.04 MB | Adobe PDF | View/Open |
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