Gravitational-wave confusion background from cosmological compact binaries: Implications for future terrestrial detectors
Gravitational-wave confusion background from cosmological compact binaries: Implications for future terrestrial detectors
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DOI：
10.1103/physrevd.79.062002
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发表时间：
2009-01
影响因子：
5
通讯作者：
T. Regimbau;S. Hughes
中科院分区：
文献类型：
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作者：
T. Regimbau;S. Hughes
提高引力波（GW）探测器的灵敏度可以提高我们测量探测源特性的能力。它还增加了对数据有贡献的弱信号的数量。由于GW探测器具有几乎全天空的灵敏度，它们可能会受到混淆限制：许多无法区分的源可能会同时被测量，从而定义了灵敏度的随机噪声基底。对于目前正在运行的GW探测器及其计划的升级，预计的事件发生率足够低，我们远离混淆限制制度。然而，目前正在讨论的一些探测器可能有足够大的范围到二进制螺旋，他们进入混乱有限的制度。在本文中，我们研究了地球探测器的二进制螺旋混淆极限。我们考虑了文献中广泛的螺旋率，几个计划先进的引力波探测器，和高度先进的“爱因斯坦望远镜”的设计。虽然大多数先进的探测器不会受到这个限制的影响，但具有非常低频的“地震墙”的爱因斯坦望远镜可能会受到混淆噪声的影响。至少，需要仔细的数据分析来分离看起来混乱的信号。在设计高度先进的futuremore »仪器时应牢记这一结果。«少
Increasing the sensitivity of a gravitational-wave (GW) detector improves our ability to measure the characteristics of detected sources. It also increases the number of weak signals that contribute to the data. Because GW detectors have nearly all-sky sensitivity, they can be subject to a confusion limit: Many sources which cannot be distinguished may be measured simultaneously, defining a stochastic noise floor to the sensitivity. For GW detectors operating at present and for their planned upgrades, the projected event rate is sufficiently low that we are far from the confusion-limited regime. However, some detectors currently under discussion may have large enough reach to binary inspiral that they enter the confusion-limited regime. In this paper, we examine the binary inspiral confusion limit for terrestrial detectors. We consider a broad range of inspiral rates in the literature, several planned advanced gravitational-wave detectors, and the highly advanced 'Einstein telescope' design. Though most advanced detectors will not be impacted by this limit, the Einstein telescope with a very low-frequency 'seismic wall' may be subject to confusion noise. At a minimum, careful data analysis will be require to separate signals which will appear confused. This result should be borne in mind when designing highly advanced futuremore » instruments.« less