论文标题
高级Ligo-Virgo的前三个观测跑
Upper limits on the Polarized Isotropic Stochastic Gravitational-Wave Background from Advanced LIGO-Virgo's First Three Observing Runs
论文作者
论文摘要
预计均衡违规将在左手和右手重力波模式的振幅之间产生不对称性，从而导致圆形极化的随机重力波背景（SGWB）。由于Ligo-Virgo网络中的三个独立基线，我们重点关注以Stokes参数为特征的应变功率的振幅差异，并进行最大的样式估计以限制SGWB的极化度。我们的结果表明，没有证据表明数据中循环极化的SGWB。此外，通过将SGWB建模为幂律光谱，我们对标准化能量密度$ω__\ text {gw}（25 \，\ text {hz}）<5.3 \ times10^{ - 9} $置于$ 95 \％$ custrust oferther colusites $ 95 \％$ custral ofers yellaginal ofercter polarginalizal offormalization和spectral Index。
Parity violation is expected to generate an asymmetry between the amplitude of left and right-handed gravitational-wave modes which leads to a circularly polarized stochastic gravitational-wave background (SGWB). Due to the three independent baselines in the LIGO-Virgo network, we focus on the amplitude difference in strain power characterized by Stokes' parameters and do maximum-likelihood estimation to constrain the polarization degree of SGWB. Our results indicate that there is no evidence for the circularly polarized SGWB in the data. Furthermore, by modeling the SGWB as a power-law spectrum, we place upper limit on the normalized energy density $Ω_\text{gw}(25\,\text{Hz})<5.3\times10^{-9}$ at $95\%$ confidence level after marginalizing over the polarization degree and spectral index.
