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  Relevance of tidal effects and post-merger dynamics for binary neutron star parameter estimation

Dudi, R., Pannarale, F., Dietrich, T., Hannam, M., Bernuzzi, S., Ohme, F., et al. (2018). Relevance of tidal effects and post-merger dynamics for binary neutron star parameter estimation. Physical Review D, 98(8): 084061. doi:10.1103/PhysRevD.98.084061.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-82D4-B Version Permalink: http://hdl.handle.net/21.11116/0000-0002-E9E9-1
Genre: Journal Article

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 Creators:
Dudi, Reetika, Author
Pannarale, Francesco, Author
Dietrich, Tim, Author
Hannam, Mark, Author
Bernuzzi, Sebastiano, Author
Ohme, Frank1, Author              
Bruegmann, Bernd, Author
Affiliations:
1Astrophysical 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: Measurements of the properties of binary neutron star systems from gravitational-wave observations require accurate theoretical models for such signals. However, current models are incomplete, as they do not take into account all of the physics of these systems: some neglect possible tidal effects, others neglect spin-induced orbital precession, and no existing model includes the post-merger regime consistently. In this work, we explore the importance of two physical ingredients: tidal interactions during the inspiral and the imprint of the post-merger stage. We use complete inspiral--merger--post-merger waveforms constructed from a tidal effective-one-body approach and numerical-relativity simulations as signals against which we perform parameter estimates with waveform models of standard LIGO-Virgo analyses. We show that neglecting tidal effects does not lead to appreciable measurement biases in masses and spin for typical observations (small tidal deformability and signal-to-noise ratio $\sim$ 25). However, with increasing signal-to-noise ratio or tidal deformability there are biases in the estimates of the binary parameters. The post-merger regime, instead, has no impact on gravitational-wave measurements with current detectors for the signal-to-noise ratios we consider.

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 Dates: 2018-08-292018
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: arXiv: 1808.09749
DOI: 10.1103/PhysRevD.98.084061
URI: http://arxiv.org/abs/1808.09749
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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: 98 (8) Sequence Number: 084061 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: https://pure.mpg.de/cone/journals/resource/111088197762258