CLASS_GWB: robust modeling of the astrophysical gravitational wave background anisotropies
CLASS_GWB: robust modeling of the astrophysical gravitational wave background anisotropies
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DOI：
10.1088/1475-7516/2022/06/030
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发表时间：
2021-10
影响因子：
6.4
通讯作者：
N. Bellomo;D. Bertacca;A. Jenkins;S. Matarrese;A. Raccanelli;T. Regimbau;A. Ricciardone;M. Sakellariadou
中科院分区：
文献类型：
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作者：
N. Bellomo;D. Bertacca;A. Jenkins;S. Matarrese;A. Raccanelli;T. Regimbau;A. Ricciardone;M. Sakellariadou
引力辐射提供了一种独特的可能性，可以以一种全新的方式研究宇宙的大尺度结构、引力波源和传播。鉴于引力波图包含了丰富的天体物理学和宇宙学信息，解释这个信号需要一个不平凡的多学科方法。在这项工作中，我们提出了完整的计算所产生的信号紧凑的对象合并会计的详细建模的天体物理源和宇宙学扰动。我们开发的CLASS_GWB代码，它允许计算的天体物理引力波背景的各向异性，占源和探测器的属性，以及引力波传播的影响。我们应用我们的数值工具来鲁棒地计算在LIGO-Virgo频段的天体物理源产生的引力波背景的各向异性的角功率谱。我们提出的端到端理论框架可以很容易地应用于其他频段的不同源和检测器。此外，同样的数值工具也可以用来计算由解析事件生成的天空引力波图的各向异性。
Gravitational radiation offers a unique possibility to study the large-scale structure of the Universe, gravitational wave sources and propagation in a completely novel way. Given that gravitational wave maps contain a wealth of astrophysical and cosmological information, interpreting this signal requires a non-trivial multidisciplinary approach. In this work we present the complete computation of the signal produced by compact object mergers accounting for a detailed modelling of the astrophysical sources and for cosmological perturbations. We develop the CLASS_GWB code, which allows for the computation of the anisotropies of the astrophysical gravitational wave background, accounting for source and detector properties, as well as effects of gravitational wave propagation. We apply our numerical tools to robustly compute the angular power spectrum of the anisotropies of the gravitational wave background generated by astrophysical sources in the LIGO-Virgo frequency band. The end-to-end theoretical framework we present can be easily applied to different sources and detectors in other frequency bands. Moreover, the same numerical tools can be used to compute the anisotropies of gravitational wave maps of the sky made using resolved events.