论文标题
深色宇宙宇宙学，带有DECIHERTZ重力波探测器
Dark-siren Cosmology with Decihertz Gravitational-wave Detectors
论文作者
论文摘要
引力波（GWS）起源于恒星质量二进制黑洞（SBBH）的合并，因为它们通常没有电磁对应物。为了通过这些事件研究宇宙，我们不仅需要从GW信号中提取的光度距离，而且还需要通过将GW Sky定位与Galaxy目录相匹配的来源的红移信息。基于这种方法，我们探讨了Decihertz GW检测器，最佳和decigo的效果如何，可以限制宇宙学参数。使用Monte-Carlo模拟的黑暗警报，我们发现Do-Optimal可以将Hubble参数限制为$ {σ_{σ_{H_0}} / {H_0} \，\ sillesim 0.23 \％$单独估计$ H_0 $，而DECIGO则可以通过5个因子进行$ {H___0}}}} = {H_0} \ Lessim 0.043 \％$。 $ h_0 $的好精度将阐明$ h_0 $张力。对于多参数估计，Decigo仍然可以达到小于$ 7 \％$的相对不确定性水平。 Decihertz探测器表现良好的原因是它们的大量SBBH GW事件具有良好的距离和角度分辨率。
Gravitational waves (GWs) originated from mergers of stellar-mass binary black holes (SBBHs) are considered as dark sirens in cosmology since they usually do not have electromagnetic counterparts. In order to study cosmos with these events, we not only need the luminosity distances extracted from GW signals, but also require the redshift information of sources via, say, matching GW sky localization with galaxy catalogs. Based on such a methodology, we explore how well decihertz GW detectors, DO-Optimal and DECIGO, can constrain cosmological parameters. Using Monte-Carlo simulated dark sirens, we find that DO-Optimal can constrain the Hubble parameter to ${σ_{H_0}} / {H_0}\, \lesssim 0.23\%$ when estimating $H_0$ alone, while DECIGO performs better by a factor of 5 with ${σ_{H_0}} / {H_0}\lesssim 0.043\%$. Such a good precision of $H_0$ will shed light on the $H_0$ tension. For multiple-parameter estimation, DECIGO can still reach a level of relative uncertainty smaller than $7\%$. The reason why decihertz detectors perform well is explained by their large numbers of SBBH GW events with good distance and angular resolution.
