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Gravitational waveforms of binary neutron star inspirals using post-Newtonian tidal splicing

Barkett, Kevin and Chen, Yanbei and Scheel, Mark A. and Varma, Vijay (2020) Gravitational waveforms of binary neutron star inspirals using post-Newtonian tidal splicing. Physical Review D, 102 (2). Art. No. 024031. ISSN 2470-0010. https://resolver.caltech.edu/CaltechAUTHORS:20200504-124134369

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Abstract

The tidal deformations of neutron stars within an inspiraling compact binary alter the orbital dynamics, imprinting a signature on the gravitational wave signal. Modeling this signal could be done with numerical-relativity simulations, but these are too computationally expensive for many applications. Analytic post-Newtonian treatments are limited by unknown higher-order nontidal terms. This paper further builds upon the “tidal splicing” model in which post-Newtonian tidal terms are “spliced” onto numerical relativity simulations of black-hole binaries. We improve on previous treatments of tidal splicing by including spherical harmonic modes beyond the (2,2) mode, expanding the post-Newtonian expressions for tidal effects to 2.5 order, including dynamical tide corrections, and adding a partial treatment of the spin-tidal dynamics. Furthermore, instead of numerical relativity simulations, we use the spin-aligned binary black hole (BBH) surrogate model “NRHybSur3dq8” to provide the BBH waveforms that are input into the tidal slicing procedure. This allows us to construct spin-aligned, inspiraling TaylorT2 and TaylorT4 splicing waveform models that can be evaluated quickly. These models are tested against existing binary neutron star and black hole–neutron star simulations. We implement the TaylorT2 splicing model as an extension to “NRHybSur3dq8,” creating a model that we call “NRHybSur3dq8Tidal.”


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1103/PhysRevD.102.024031DOIArticle
https://arxiv.org/abs/1911.10440arXivDiscussion Paper
ORCID:
AuthorORCID
Barkett, Kevin0000-0001-8230-4363
Chen, Yanbei0000-0002-9730-9463
Varma, Vijay0000-0002-9994-1761
Alternate Title:Gravitational waveforms of binary neutron star inspirals using PN Tidal Splicing
Additional Information:© 2020 American Physical Society. Received 25 November 2019; accepted 11 June 2020; published 9 July 2020. Research in this paper is supported by the the the Sherman Fairchild Foundation, the Simons Foundation (Award No. 568762), and the National Science Foundation (Grants No. PHY-1708212 and No. PHY-1708213).
Group:TAPIR, Walter Burke Institute for Theoretical Physics, Astronomy Department
Funders:
Funding AgencyGrant Number
Sherman Fairchild FoundationUNSPECIFIED
Simons Foundation568762
NSFPHY-1708212
NSFPHY-1708213
Issue or Number:2
Record Number:CaltechAUTHORS:20200504-124134369
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200504-124134369
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:102977
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:04 May 2020 20:08
Last Modified:09 Jul 2020 21:11

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