论文标题
二进制中子星合并波形的核心数据库的第二版
Second release of the CoRe database of binary neutron star merger waveforms
论文作者
论文摘要
我们介绍了由计算相对性（CORE）协作执行的二进制中子星合并模拟的重力波形的第二个数据释放。当前数据库由254个不同的二进制中子星形配置组成，共有590个单独的数值 - 余量模拟，使用各种网格分辨率。释放的波形数据包含应变，Weyl曲率多极最大为$ \ ell = M = 4 $。它们跨越了质量，质量比率，自旋和偏心参数空间的很大一部分，并包括针对GW170817和GW190425的事件的目标配置。核心模拟使用18个不同的状态方程式进行，其中7个是有限温度模型，其中三个是非数量的自由度。大约一半的释放数据是用高阶流体力学方案计算的，以合并数十个轨道。另一半由高级微物理学计算。我们展示了标准波形误差分析，并以忠诚讨论数据库的准确性。我们提出了合并时对国家不敏感关系方程（例如合并频率），光度峰和合并后频谱方程的现成拟合公式。
We present the second data release of gravitational waveforms from binary neutron star merger simulations performed by the Computational Relativity (CoRe) collaboration. The current database consists of 254 different binary neutron star configurations and a total of 590 individual numerical-relativity simulations using various grid resolutions. The released waveform data contain the strain and the Weyl curvature multipoles up to $\ell=m=4$. They span a significant portion of the mass, mass-ratio,spin and eccentricity parameter space and include targeted configurations to the events GW170817 and GW190425. CoRe simulations are performed with 18 different equations of state, seven of which are finite temperature models, and three of which account for non-hadronic degrees of freedom. About half of the released data are computed with high-order hydrodynamics schemes for tens of orbits to merger; the other half is computed with advanced microphysics. We showcase a standard waveform error analysis and discuss the accuracy of the database in terms of faithfulness. We present ready-to-use fitting formulas for equation of state-insensitive relations at merger (e.g. merger frequency), luminosity peak, and post-merger spectrum.
