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  Accurate numerical simulations of inspiralling binary neutron stars and their comparison with effective-one-body analytical models

Baiotti, L., Damour, T., Giacomazzo, B., Nagar, A., & Rezzolla, L. (2011). Accurate numerical simulations of inspiralling binary neutron stars and their comparison with effective-one-body analytical models. Physical Review D, 84(2): 024017. doi:10.1103/PhysRevD.84.024017.

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Datensatz-Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-06EF-6 Versions-Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-06F0-D
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 Urheber:
Baiotti, Luca, Autor
Damour, Thibault, Autor
Giacomazzo, Bruno1, Autor              
Nagar, Alessandro, Autor
Rezzolla, Luciano1, Autor              
Affiliations:
1Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24013              

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Schlagwörter: General Relativity and Quantum Cosmology, gr-qc
 Zusammenfassung: Binary neutron-star systems represent one of the most promising sources of gravitational waves. In order to be able to extract important information, notably about the equation of state of matter at nuclear density, it is necessary to have in hands an accurate analytical model of the expected waveforms. Following our recent work, we here analyze more in detail two general-relativistic simulations spanning about 20 gravitational-wave cycles of the inspiral of equal-mass binary neutron stars with different compactnesses, and compare them with a tidal extension of the effective-one-body (EOB) analytical model. The latter tidally extended EOB model is analytically complete up to the 1.5 post-Newtonian level, and contains an analytically undetermined parameter representing a higher-order amplification of tidal effects. We find that, by calibrating this single parameter, the EOB model can reproduce, within the numerical error, the two numerical waveforms essentially up to the merger. By contrast, analytical models (either EOB, or Taylor-T4) that do not incorporate such a higher-order amplification of tidal effects, build a dephasing with respect to the numerical waveforms of several radians.

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 Datum: 2011-03-202011-10-122011
 Publikationsstatus: Im Druck publiziert
 Seiten: 25 pages, 17 figs. Matched published version
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
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 Identifikatoren: arXiv: 1103.3874
DOI: 10.1103/PhysRevD.84.024017
URI: http://arxiv.org/abs/1103.3874
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Titel: Physical Review D
  Andere : Phys. Rev. D.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Lancaster, Pa. : Published for the American Physical Society by the American Institute of Physics
Seiten: - Band / Heft: 84 (2) Artikelnummer: 024017 Start- / Endseite: - Identifikator: ISSN: 0556-2821
CoNE: /journals/resource/111088197762258