Strong gravitational lensing of gravitational waves from double compact binaries - perspectives for the Einstein Telescope
Strong gravitational lensing of gravitational waves from double compact binaries - perspectives for the Einstein Telescope
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DOI：
10.1088/1475-7516/2014/10/080
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发表时间：
2014-10-01
影响因子：
6.4
通讯作者：
Zhu, Zong-Hong
中科院分区：
文献类型：
--
作者：
Biesiada, Marek;Ding, Xuheng;Zhu, Zong-Hong
引力波（GW）实验正在进入高级阶段，这将很快打开一个新的宇宙观测窗口。展望未来，爱因斯坦望远镜（ET）的设计具有比先进的GW探测器显著提高的灵敏度。双致密天体（DCO）是被ET大量观测到的最重要的GW源之一，其中一些事件应该是由居间星系引力透镜引起的，本文探讨了在ET中观测引力透镜内旋DCO事件的前景。这一分析是对我们以前的论文[6]的重要扩展。我们使用的是[5]用StarTrack布居合成演化程序计算的位于不同红移的整个DCO类（NS-NS，BH-NS，BH-BH）的内禀合并率。我们详细讨论了每个进化情景的预测。我们的一般结论是，ET每年将记录大约50-100个强透镜螺旋事件。只有在新生黑洞受到强烈反冲的情况下，才能预测每年发生几次事件。这样的透镜事件将由BH-BH合并双星系统主导。我们的研究结果表明，在几年的成功运作ET将提供一个相当大的目录强透镜事件。
Gravitational wave (GW) experiments are entering their advanced stage which should soon open a new observational window on the Universe. Looking into this future, the Einstein Telescope (ET) was designed to have a fantastic sensitivity improving significantly over the advanced GW detectors. One of the most important astrophysical GW sources supposed to be detected by the ET in large numbers are double compact objects (DCO) and some of such events should be gravitationally lensed by intervening galaxies.We explore the prospects of observing gravitationally lensed inspiral DCO events in the ET. This analysis is a significant extension of our previous paper [6]. We are using the intrinsic merger rates of the whole class of DCO (NS-NS,BH-NS,BH-BH)located at different redshifts as calculated by [5] by using StarTrack population synthesis evolutionary code. We discuss in details predictions from each evolutionary scenario. Our general conclusion is that ET would register about 50-100 strongly lensed inspiral events per year. Only the scenario in which nascent BHs receive strong kick gives the predictions of a few events per year. Such lensed events would be dominated by the BH-BH merging binary systems. Our results suggest that during a few years of successful operation ET will provide a considerable catalog of strongly lensed events.