High-accuracy waveforms for black hole-neutron star systems with spinning black holes
High-accuracy waveforms for black hole-neutron star systems with spinning black holes
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DOI：
10.1103/physrevd.103.064007
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发表时间：
2020-10
影响因子：
5
通讯作者：
F. Foucart;A. Chernoglazov;M. Boyle;T. Hinderer;Marleen L. Miller;Jordan Moxon;M. Scheel;N. Deppe-N.
中科院分区：
文献类型：
--
作者：
F. Foucart;A. Chernoglazov;M. Boyle;T. Hinderer;Marleen L. Miller;Jordan Moxon;M. Scheel;N. Deppe-N.
精确的数值波形是建立和校准可靠的引力波天体物理波形模型的重要要求。然而，对于黑洞-中子星双星，很少有精确的波形可以公开获得。大多数最新的模型都被校准到大量较旧的模拟中，这些模拟具有较好的参数空间覆盖范围，适用于低自旋非处理双星，但精度有限，而较少数量的较长，较新的模拟仅限于非自旋黑洞。在本文中，我们给出了包含快速旋转黑洞的三个新系统的长而精确的数值波形，以及一个处理配置。我们详细研究了模拟的准确性，特别是首次在BHNS二进制背景下进行了波形外推方法与柯西特征提取结果的详细比较。新波形正面看有0.99美元。对于边缘观测，特别是对于进动系统，模型和模拟之间的分歧增加了，包括进动和/或高阶模式的模型开始比目前缺乏这些特征的BHNS模型表现得更好。
The availability of accurate numerical waveforms is an important requirement for the creation and calibration of reliable waveform models for gravitational wave astrophysics. For black hole-neutron star binaries, very few accurate waveforms are however publicly available. Most recent models are calibrated to a large number of older simulations with good parameter space coverage for low-spin non-precessing binaries but limited accuracy, and a much smaller number of longer, more recent simulations limited to non-spinning black holes. In this paper, we present long, accurate numerical waveforms for three new systems that include rapidly spinning black holes, and one precessing configuration. We study in detail the accuracy of the simulations, and in particular perform for the first time in the context of BHNS binaries a detailed comparison of waveform extrapolation methods to the results of Cauchy Characteristic Extraction. The new waveforms have $ 0.99$) for binaries seen face-on. For edge-on observations, particularly for precessing systems, disagreements between models and simulations increase, and models that include precession and/or higher-order modes start to perform better than BHNS models that currently lack these features.