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  Simulations of inspiraling and merging double neutron stars using the Spectral Einstein Code

Haas, R., Ott, C. D., Szilagyi, B., Kaplan, J. D., Lippuner, J., Scheel, M. A., et al. (2016). Simulations of inspiraling and merging double neutron stars using the Spectral Einstein Code. Physical Review D, 93: 124062. doi:10.1103/PhysRevD.93.124062.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-7173-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-ECA5-A
Genre: Journal Article

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 Creators:
Haas, Roland1, Author              
Ott, Christian D.2, Author              
Szilagyi, Bela3, Author              
Kaplan, Jeffrey D., Author
Lippuner, Jonas, Author
Scheel, Mark A., Author
Barkett, Kevin, Author
Muhlberger, Curran D., Author
Dietrich, Tim, Author
Duez, Matthew D., Author
Foucart, Francois, Author
Pfeiffer, Harald P., Author
Kidder, Lawrence E., Author
Teukolsky, Saul A., Author
Affiliations:
1Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1933290              
2Stellar Astrophysics, MPI for Astrophysics, Max Planck Society, ou_159882              
3Astrophysical 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: We present results on the inspiral, merger, and post-merger evolution of a neutron star - neutron star (NSNS) system. Our results are obtained using the hybrid pseudospectral-finite volume Spectral Einstein Code (SpEC). To test our numerical methods, we evolve an equal-mass system for $\approx 22$ orbits before merger. This waveform is the longest waveform obtained from fully general-relativistic simulations for NSNSs to date. Such long (and accurate) numerical waveforms are required to further improve semi-analytical models used in gravitational wave data analysis, for example the effective one body models. We discuss in detail the improvements to SpEC's ability to simulate NSNS mergers, in particular mesh refined grids to better resolve the merger and post-merger phases. We provide a set of consistency checks and compare our results to NSNS merger simulations with the independent BAM code. We find agreement between them, which increases confidence in results obtained with either code. This work paves the way for future studies using long waveforms and more complex microphysical descriptions of neutron star matter in SpEC.

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 Dates: 2016-04-0420162016
 Publication Status: Published in print
 Pages: 23 pages, 15 figures
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1604.00782
URI: http://arxiv.org/abs/1604.00782
DOI: 10.1103/PhysRevD.93.124062
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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: 93 Sequence Number: 124062 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: /journals/resource/111088197762258