Minimally-modeled search of higher multipole gravitational-wave radiation in compact binary coalescences
Minimally-modeled search of higher multipole gravitational-wave radiation in compact binary coalescences
复制标题
致密双星聚结中更高多极引力波辐射的最小模型搜索
DOI：
10.1088/1361-6382/ac45da
复制
发表时间：
2022
影响因子：
3.5
通讯作者：
Miani, A
中科院分区：
文献类型：
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作者：
Vedovato, G;Milotti, E;Prodi, G A;Bini, S;Drago, M;Gayathri, V;Halim, O;Lazzaro, C;Lopez, D;Miani, A
随着高级LIGO和高级Virgo干涉仪（很快将加入KAGRA干涉仪）的灵敏度增加，它们探测到越来越多的引力波，除了主导的（2，2）多极之外，还存在大量的更高多极（HM）。这些HM可以用不同的方法来检测，例如最小模型化的突发搜索方法，在这里，我们讨论了一种基于相干WaveBurst（cWB）管道的方法。在inspiral阶段的HM产生啁啾的瞬时频率是多个占主导地位的（2，2）多极，在这里，我们描述了如何cWB可以用来检测这些频谱特征。搜索在时间-频率表示的合适区域内执行;它们的形状通过优化接收器操作特性来确定。这种新方法已经在GW 190814发现论文中使用（Abbott et al 2020 Astrophys. J. Lett. 896 L44），非常快速和灵活。在这里，我们详细描述了用于检测GW 190814中的（3，3）多极子以及在螺旋阶段搜索其他HM的过程，并将其应用于显示HM的另一个事件GW 190412，复制用不同方法获得的结果。这里描述的程序可用于HM的快速分析，并支持基于模型的贝叶斯参数估计所获得的结果。
As the Advanced LIGO and Advanced Virgo interferometers, soon to be joined by the KAGRA interferometer, increase their sensitivity, they detect an ever-larger number of gravitational waves with a significant presence of higher multipoles (HMs) in addition to the dominant (2, 2) multipole. These HMs can be detected with different approaches, such as the minimally-modeled burst search methods, and here we discuss one such approach based on the coherent WaveBurst (cWB) pipeline. During the inspiral phase the HMs produce chirps whose instantaneous frequency is a multiple of the dominant (2, 2) multipole, and here we describe how cWB can be used to detect these spectral features. The search is performed within suitable regions of the time-frequency representation; their shape is determined by optimizing the receiver operating characteristics. This novel method has already been used in the GW190814 discovery paper (Abbott et al 2020 Astrophys. J. Lett. 896 L44) and is very fast and flexible. Here we describe in full detail the procedure used to detect the (3, 3) multipole in GW190814 as well as searches for other HMs during the inspiral phase, and apply it to another event that displays HMs, GW190412, replicating the results obtained with different methods. The procedure described here can be used for the fast analysis of HMs and to support the findings obtained with the model-based Bayesian parameter estimates.
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