论文标题
改善了用丽莎的随机重力波背景的重建
Improved reconstruction of a stochastic gravitational wave background with LISA
论文作者
论文摘要
我们提出了一种数据分析方法，用于与丽莎随机重力波背景的光谱形状的模型无关重建。我们通过包含一组完整的TDI通道来改善依赖于单个时间延迟式互动仪（TDI）通道的先前提出的重建算法。与较早的工作一样，我们假设一种理想化的等边配置。我们通过许多案例研究测试了改进的算法，包括在存在两个不同天体物理前景信号的情况下重建。我们发现，包括其他渠道以不同的方式有助于：它减少了重建的不确定性；它使全球可能性最大化不容易陷入当地的极端。它有效地打破了信号和仪器噪声之间的变性。
We present a data analysis methodology for a model-independent reconstruction of the spectral shape of a stochastic gravitational wave background with LISA. We improve a previously proposed reconstruction algorithm that relied on a single Time-Delay-Interferometry (TDI) channel by including a complete set of TDI channels. As in the earlier work, we assume an idealized equilateral configuration. We test the improved algorithm with a number of case studies, including reconstruction in the presence of two different astrophysical foreground signals. We find that including additional channels helps in different ways: it reduces the uncertainties on the reconstruction; it makes the global likelihood maximization less prone to falling into local extrema; and it efficiently breaks degeneracies between the signal and the instrumental noise.
