论文标题
用激光干涉仪空间天线制作最大似然图制作
Maximum likelihood map-making with the Laser Interferometer Space Antenna
论文作者
论文摘要
鉴于重力波检测技术的最新进展，带有激光干涉仪空间天线（LISA）的重力波背景（GWB）的检测和表征是实际的可能性。为了评估丽莎卫星网络重建不同角度尺度和天空不同方向的各向异性的能力，我们基于最佳二次估计器开发了一个地图制造商。所得的地图是在广泛频率上集成的天空中GWB强度的最大似然表示。我们通过重建具有不同输入分布和不同频率范围的已知输入图来测试算法。我们发现，在最佳的噪声和高频的最佳场景中，高SNR信号，最大尺度lisa May探针为$ \ ell _ {\ rm max} \ lyssim 15 $。地图制造商还允许测试Lisa噪声的定向依赖性，从而了解我们可能期望的方向天空灵敏度。
Given the recent advances in gravitational-wave detection technologies, the detection and characterisation of gravitational-wave backgrounds (GWBs) with the Laser Interferometer Space Antenna (LISA) is a real possibility. To assess the abilities of the LISA satellite network to reconstruct anisotropies of different angular scales and in different directions on the sky, we develop a map-maker based on an optimal quadratic estimator. The resulting maps are maximum likelihood representations of the GWB intensity on the sky integrated over a broad range of frequencies. We test the algorithm by reconstructing known input maps with different input distributions and over different frequency ranges. We find that, in an optimal scenario of well understood noise and high frequency, high SNR signals, the maximum scales LISA may probe are $\ell_{\rm max} \lesssim 15$. The map-maker also allows to test the directional dependence of LISA noise, providing insight on the directional sky sensitivity we may expect.
