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ID: 426892.0, MPI für Gravitationsphysik / Astrophysical Relativity
Accurate evolutions of inspiralling neutron-star binaries: assessment of the truncation error
Authors:Baiotti, Luca; Giacomazzo, Bruno; Rezzolla, Luciano
Date of Publication (YYYY-MM-DD):2009
Title of Journal:Classical and Quantum Gravity
Volume:26
Sequence Number of Article:114005
Review Status:not specified
Audience:Not Specified
Abstract / Description:We have recently presented an investigation in full general relativity of the dynamics and gravitational-wave emission from binary neutron stars which inspiral and merge, producing a black hole surrounded by a torus (see arXiv:0804.0594). We here discuss in more detail the convergence properties of the results presented in arXiv:0804.0594 and, in particular, the deterioration of the convergence rate at the merger and during the survival of the merged object, when strong shocks are formed and turbulence develops. We also show that physically reasonable and numerically convergent results obtained at low-resolution suffer however from large truncation errors and hence are of little physical use. We summarize our findings in an "error budget", which includes the different sources of possible inaccuracies we have investigated and provides a first quantitative assessment of the precision in the modelling of compact fluid binaries.
External Publication Status:published
Document Type:Article
Communicated by:Bernhard F. Schutz
Affiliations:MPI für Gravitationsphysik/Astrophysical Relativity
Identifiers:LOCALID:arXiv:0901.4955
DOI:10.1088/0264-9381/26/11/114005
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