论文标题
通过光度测量来限制随机重力波背景
Constraining the Stochastic Gravitational Wave Background with Photometric Surveys
论文作者
论文摘要
随机重力波背景（SGWB）的检测对于理解黑洞种群至关重要，尤其是对于超级质量的黑洞二进制组。脉冲星定时阵列（PTA）合作的最新有希望的结果暗示了即将检测。在本文中，我们研究了相对的星体重力检测方法，这可以有助于Microhertz范围内的SGWB研究。我们将罗马空间望远镜和盖亚视为候选人，并定量讨论频率和空间域中的调查敏感性。我们通过考虑平均观点（FOV）信号减法和角功率谱箱来强调调查特定约束对性能估计的重要性。我们得出的结论是，如果SGWB的水平与PTA估计值类似，那么罗马和盖亚都有可能检测这种频域功率过量的潜力。但是，罗马和盖亚都受到FOV的限制，并且不太可能对SGWB的空间模式敏感。
The detection of the Stochastic Gravitational Wave Background (SGWB) is essential for understanding black hole populations, especially for supermassive black hole binaries. The recent promising results from various Pulsar Timing Array (PTA) collaborations allude to an imminent detection. In this paper, we investigate the relative astrometric gravitational wave detection method, which can contribute to SGWB studies in the microhertz range. We consider the Roman Space Telescope and Gaia as candidates and quantitatively discuss the survey sensitivity in both the frequency and spatial domains. We emphasize the importance of survey specific constraints on performance estimates by considering mean field of view (FoV) signal subtraction and angular power spectrum binning. We conclude that if the SGWB is at a similar level as in PTA estimates, both Roman and Gaia have the potential to detect this frequency-domain power excess. However, both Roman and Gaia are subject to FoV limitations, and are unlikely to be sensitive to the spatial pattern of the SGWB.
