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  Systematic effects from black hole-neutron star waveform model uncertainties on the neutron star equation of state

Chakravarti, K., Gupta, A., Bose, S., Duez, M. D., Caro, J., Brege, W., et al. (2019). Systematic effects from black hole-neutron star waveform model uncertainties on the neutron star equation of state. Physical Review D, 99: 024049. doi:10.1103/PhysRevD.99.024049.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-4AF4-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-F957-4
Genre: Journal Article

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 Creators:
Chakravarti, Kabir, Author
Gupta, Anuradha, Author
Bose, Sukanta, Author
Duez, Matthew D., Author
Caro, Jesus, Author
Brege, Wyatt, Author
Foucart, Francois, Author
Ghosh, Shaon, Author
Kyutoku, Koutarou, Author
Lackey, Benjamin1, Author              
Shibata, Masaru2, Author              
Hemberger, Daniel A., Author
Kidder, Lawrence E., Author
Pfeiffer, Harald1, Author              
Scheel, Mark A., Author
Affiliations:
1Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1933290              
2Computational Relativistic Astrophysics, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_2541714              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc, Astrophysics, Solar and Stellar Astrophysics, astro-ph.SR
 Abstract: We identify various contributors of systematic effects in the measurement of the neutron star (NS) tidal deformability and quantify their magnitude for several types of neutron star - black hole (NSBH) binaries. Gravitational waves from NSBH mergers contain information about the components' masses and spins as well as the NS equation of state. Extracting this information requires comparison of the signal in noisy detector data with theoretical templates derived from some combination of post-Newtonian (PN) approximants, effective one-body (EOB) models and %analytic fits to numerical relativity (NR) simulations. The accuracy of these templates is limited by errors in the NR simulations, by the approximate nature of the PN/EOB waveforms, and by the hybridization procedure used to combine them. In this paper, we estimate the impact of these errors by constructing and comparing a set of PN-NR hybrid waveforms, for the first time with NR waveforms from two different codes, namely, SpEC and SACRA, for such systems. We then attempt to recover the parameters of the binary using two non-precessing template approximants. We find that systematic errors are too large for tidal effects to be accurately characterized for any realistic NS equation of state model. We conclude that NSBH waveform models must be significantly improved if they are to be useful for the extraction of NS equation of state information or even for distinguishing NSBH systems from binary black holes.

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 Dates: 2018-09-122019
 Publication Status: Published in print
 Pages: -
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 Rev. Method: -
 Identifiers: arXiv: 1809.04349
URI: http://arxiv.org/abs/1809.04349
DOI: 10.1103/PhysRevD.99.024049
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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: 024049 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: https://pure.mpg.de/cone/journals/resource/111088197762258