论文标题
在天体物理前景存在下测量原始重力波背景
Measuring the primordial gravitational-wave background in the presence of astrophysical foregrounds
论文作者
论文摘要
原始引力波有望创建一个随机背景，编码有关早期宇宙的信息，而其他方式可能无法通过其他方式访问。然而，原始背景被一个天体物理前景所掩盖，该天体由紧凑型二进制室的重力波组成。我们展示了一种贝叶斯方法，用于在天体物理前景存在下估计原始背景。由于背景和前景信号参数是同时估算的，因此没有减法步骤，因此我们避免了原始测量的天体物理污染，有时称为“残留物”。此外，由于我们在模型中包括天体物理前景的非高斯性，因此该方法代表了同时检测多组分随机背景的统计学上最佳方法。
Primordial gravitational waves are expected to create a stochastic background encoding information about the early Universe that may not be accessible by other means. However, the primordial background is obscured by an astrophysical foreground consisting of gravitational waves from compact binaries. We demonstrate a Bayesian method for estimating the primordial background in the presence of an astrophysical foreground. Since the background and foreground signal parameters are estimated simultaneously, there is no subtraction step, and therefore we avoid astrophysical contamination of the primordial measurement, sometimes referred to as "residuals". Additionally, since we include the non-Gaussianity of the astrophysical foreground in our model, this method represents the statistically optimal approach to the simultaneous detection of a multi-component stochastic background.
