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  Extracting the orbital axis from gravitational waves of precessing binary systems

Kawaguchi, K., Kyutoku, K., Nakano, H., & Shibata, M. (2018). Extracting the orbital axis from gravitational waves of precessing binary systems. Physical Review D, 97: 024017. doi:10.1103/PhysRevD.97.024017.

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 Creators:
Kawaguchi, Kyohei1, Author
Kyutoku, Koutarou, Author
Nakano, Hiroyuki, Author
Shibata, Masaru2, Author           
Affiliations:
1AEI-Golm, MPI for Gravitational Physics, Max Planck Society, Golm, DE, ou_24008              
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
 Abstract: We present a new method for extracting the instantaneous orbital axis only
from gravitational wave strains of precessing binary systems observed from a
particular observer direction. This method enables us to reconstruct the
co-precessing frame waveforms only from observed quantities for the ideal case
that the signal-to-noise ratio is high enough to analyze the waveforms
directly. Specifically, we do not assume knowledge of the time evolution of the
instantaneous orbital axis and the co-precessing waveforms before analyzing the
data in our method. We test and measure the accuracy of our method using the
numerical relativity simulation data of precessing binary black holes taken
from the SXS Catalog. We show that the direction of the orbital axis is
extracted within $\approx0.02~{\rm rad}$ error from gravitational waves emitted
during the inspiral phase. The co-precessing waveforms are also reconstructed
with high accuracy; the mismatch (assuming white noise) between them and the
original co-precessing waveforms is typically a few times $10^{-3}$ including
the merger-ringdown phase, and can be improved by an order of magnitude
focusing only on the inspiral waveform. In this method, the co-precessing frame
waveforms are not only the purely technical tools for understanding the complex
nature of precessing waveforms but also direct observables.

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 Dates: 2017-05-212018
 Publication Status: Issued
 Pages: 11 pages, 8 figures, 1 table
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 Table of Contents: -
 Rev. Type: -
 Degree: -

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Title: Physical Review D
  Other : Phys. Rev. D.
Source Genre: Journal
 Creator(s):
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Publ. Info: Lancaster, Pa. : American Physical Society
Pages: - Volume / Issue: 97 Sequence Number: 024017 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: https://pure.mpg.de/cone/journals/resource/111088197762258