双中子星并合产生的千赫兹引力波：数值相对论的并合后模型
Kilohertz Gravitational Waves From Binary Neutron Star Mergers: Numerical-relativity Informed Postmerger Model
摘要：
我们提出了${\tt NRPMw}$，一个分析模型的引力波从中子星合并残留物通知使用618数值相对论（NR）模拟。${\tt NRPMw}$在频域中使用复数高斯小波的组合来设计。小波的参数校准状态方程（EOS）不敏感的关系从NR数据。NR模拟计算21 EOS（其中7个是有限温度的微物理模型，其中3个包含夸克相变或超子自由度）和跨度总二进制质量$M\in[2.4,3.4]~{\rm M}_\odot$，质量比高达$q=2$，（非旋进）无量纲自旋幅度高达${0.2}$。EOS不敏感的关系的理论不确定性被纳入${\tt NRPMw}$使用重新校准参数，提高了模型的灵活性和准确性。${\tt NRPMw}$是NR-忠实的，拟合因子${\gtrsim}0.9$是在102个模拟的独立验证集上计算的。
英文摘要：
We present ${\tt NRPMw}$, an analytical model of gravitational-waves from neutron star merger remnants informed using 618 numerical relativity (NR) simulations. ${\tt NRPMw}$ is designed in the frequency domain using a combination of complex Gaussian wavelets. The wavelet's parameters are calibrated to equations of state (EOS) insensitive relations from NR data. The NR simulations are computed with 21 EOS (7 of which are finite-temperature microphysical models, and 3 of which contain quark phase transitions or hyperonic degrees of freedom) and span total binary masses $M\in[2.4,3.4]~{\rm M}_\odot$, mass ratios up to $q=2$, and (nonprecessing) dimensionless spins magnitudes up to ${0.2}$. The theoretical uncertainties of the EOS-insensitive relations are incorporated in ${\tt NRPMw}$ using recalibration parameters that enhance the flexibility and accuracy of the model. ${\tt NRPMw}$ is NR-faithful with fitting factors ${\gtrsim}0.9$ computed on an independent validation set of 102 simulations.
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