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  Enhancing gravitational waveform models through dynamic calibration

Setyawati, Y. E., Ohme, F., & Khan, S. (2019). Enhancing gravitational waveform models through dynamic calibration. Physical Review D, 99: 024010. doi:10.1103/PhysRevD.99.024010.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-6D57-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-FA01-3
Genre: Journal Article

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 Creators:
Setyawati, Yoshinta Eka1, Author              
Ohme, Frank2, Author              
Khan, Sebastian1, Author              
Affiliations:
1Binary Merger Observations and Numerical Relativity, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_2461691              
2Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24013              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc
 Abstract: Strategies to model the inspiral, merger and ringdown gravitational waveform of coalescing binaries are restricted in parameter space by the coverage of available numerical-relativity simulations. When more numerical waveforms become available, substantial efforts to manually (re-)calibrate models are required. The aim of this study is to overcome these limitations. We explore a method to combine the information of two waveform models: an accurate, but computationally expensive target model, and a fast but less accurate approximate model. In an automatic process we systematically update the basis representation of the approximate model using information from the target model and call the new model as the enriched basis. This new model can be evaluated anywhere in the parameter space jointly covered by either the approximate or target model, and the enriched basis model is considerably more accurate in regions where the sparse target signals were available. Here we show a proof-of-concept construction of signals from non-precessing, spinning black-hole binaries based on the phenomenological waveform family. We show that obvious shortcomings of the previous PhenomB being the approximate model in the region of unequal masses and unequal spins can be corrected by combining its basis with interpolated projection coefficients derived from the more recent and accurate PhenomD as the target model. Our success in building such a model constitutes an major step towards dynamically combining numerical relativity data and analytical waveform models in the computationally demanding analysis of LIGO and Virgo data.

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 Dates: 2018-10-162019
 Publication Status: Published in print
 Pages: 14 pages, 13 figures
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 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1810.07060
URI: http://arxiv.org/abs/1810.07060
DOI: 10.1103/PhysRevD.99.024010
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Title: Physical Review D
  Other : Phys. Rev. D.
Source Genre: Journal
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Publ. Info: Lancaster, Pa. : American Physical Society
Pages: - Volume / Issue: 99 Sequence Number: 024010 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: https://pure.mpg.de/cone/journals/resource/111088197762258