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arXiv 0901.4955gr-qcastro-ph.HE
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螺旋上升中子星双星的精确演化:截断误差的评估

Accurate evolutions of inspiralling neutron-star binaries: assessment of the truncation error

Luca Baiotti, Bruno Giacomazzo, Luciano Rezzolla

摘要:

最近,我们提出了一个完整的广义相对论的研究,研究了双中子星的动力学和引力波发射,它们盘旋并合并,产生一个被环面包围的黑洞(见arXiv:0804.0594)。在这里,我们更详细地讨论arXiv:0804.0594中提出的结果的收敛特性,特别是,在合并和合并对象的生存期间,当强冲击形成和湍流发展时,收敛速率的恶化。我们还表明,物理上合理的和数值收敛的结果在低分辨率下获得的,但遭受大的截断误差,因此是很少的物理用途。我们总结了我们的研究结果中的“错误预算”,其中包括可能的不准确性,我们已经调查的不同来源,并提供了第一个定量评估的精度在紧凑的流体二进制的建模。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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