Binary neutron-star mergers with Whisky and SACRA: First quantitative comparison of results from independent general-relativistic hydrodynamics codes
Binary neutron-star mergers with Whisky and SACRA: First quantitative comparison of results from independent general-relativistic hydrodynamics codes
复制标题
双中子星与 Whiskey 和 SACRA 的合并：独立广义相对论流体动力学代码结果的首次定量比较
DOI：
10.1103/physrevd.82.064015
复制
发表时间：
2010
影响因子：
5
通讯作者：
Tetsuro Yamamoto
中科院分区：
文献类型：
--
作者：
L. Baiotti;M. Shibata;Tetsuro Yamamoto
我们提出了两个独立的广义相对论流体动力学代码，威士忌代码和Sacra代码的第一个定量比较。我们比较了从相同的初始数据开始的模拟输出，并进行了配置（数值方法，网格设置，分辨率，仪表），其中每个代码已被发现，以提供一致的和足够准确的结果，特别是在清洁的重力波形。我们专注于在演化过程中应该守恒的量（静止质量，总质量能量和总角动量）以及引力波的振幅和频率。我们发现，这两个代码产生的结果同意在一个合理的水平，在不同的数量变化，但总是在优于约10%。
We present the first quantitative comparison of two independent general-relativistic hydrodynamics codes, the whisky code and the sacra code. We compare the output of simulations starting from the same initial data and carried out with the configuration (numerical methods, grid setup, resolution, gauges) which for each code has been found to give consistent and sufficiently accurate results, in particular, in terms of cleanness of gravitational waveforms. We focus on the quantities that should be conserved during the evolution (rest mass, total mass energy, and total angular momentum) and on the gravitational-wave amplitude and frequency. We find that the results produced by the two codes agree at a reasonable level, with variations in the different quantities but always at better than about 10%.
影响因子：
5
作者：
B. Bruegmann;José A. González;M. Hannam;S. Husa;U. Sperhake;W. Tichy
通讯作者：
B. Bruegmann;José A. González;M. Hannam;S. Husa;U. Sperhake;W. Tichy