论文标题
处女座牛顿 - 噪声重新评估
VIRGO Newtonian-noise reassessment
论文作者
论文摘要
Ligo和处女座的科学合作使他们的前两个观察跑步中的二进制黑洞的十个自信检测和二进制中子恒星的一个自信探测已经对研究宇宙产生了巨大的愿望，以研究宇宙，并从这些紧凑的物体中扩展了天文学的知识。限制可实现的检测器带宽的基本噪声源之一是由陆地重力波动引起的牛顿噪声给出的。重要的是要非常准确地对牛顿噪声光谱进行建模，因为无法直接使用当前技术对其进行监控。在本文中，我们显示了通过更准确地对处女座天文台的当前配置进行建模而获得的牛顿噪声曲线的减少。在处女座中，每个测试镜下面的结构都有干净的房间或凹陷，形成了探测器的主要两个Fabry-Perot手臂腔。我们计算出源自各向同性雷利场（包括凹陷结构）的位移。我们发现，相对于以前的模型，频带的总应变降噪系数为2。还原因子取决于频率，并且在单个测试质量之间也有所不同。
The LIGO and Virgo scientific collaborations have cataloged ten confident detections from binary black holes and one from binary neutron stars in their first two observing runs, which has already brought up an immense desire among the scientists to study the universe and to extend the knowledge of astrophysics from these compact objects. One of the fundamental noise sources limiting the achievable detector bandwidth is given by Newtonian noise arising from terrestrial gravity fluctuations. It is important to model Newtonian noise spectra very accurately as it cannot be monitored directly using current technology. In this article, we show the reduction in the Newtonian noise curve obtained by more accurately modelling the current configuration of the Virgo observatory. In Virgo, there are clean rooms or recess like structures underneath each test mirror forming the main two Fabry-Perot arm cavities of the detector. We compute the displacements originating from an isotropic Rayleigh field including the recess structure. We find an overall strain noise reduction factor of 2 in the frequency band from 12 to about 15 Hz relative to previous models. The reduction factor depends on frequency and also varies between individual test masses.
