利用暗能量调查第6年黄金星系目录和第四引力波瞬变目录测量哈勃常数
Measurement of the Hubble constant using the Dark Energy Survey Year 6 Gold galaxy catalogue and the fourth Gravitational-Wave Transient Catalogue
AI总结：
该研究利用第四引力波瞬变目录与暗能量调查第6年黄金星系目录，通过gwcosmo管道联合推断参数，测量哈勃常数\(H_0\)，分析星系目录属性影响，限制红移范围得到测量结果，展示了深度星系目录在GW宇宙学中的应用。
摘要：
引力波（GW）标准信号可对哈勃常数\(H_0\)进行独立测量。在没有电磁对应体的情况下，“暗信号”方法将GW事件与潜在宿主星系进行统计关联。本文利用GWTC - 4.0（第四引力波瞬变目录）与暗能量调查第6年黄金光度星系目录对\(H_0\)进行测量。通过gwcosmo管道联合推断宇宙学和GW总体参数。分析星系目录属性对推断的影响，识别出星系红移分布中可能引入偏差的显著特征。通过将星系目录限制在\(0.05<z<0.50\)以与共动体积均匀星系分布保持一致，从暗信号得到\(H_0 = 71.7^{+22.7}_{-18.3}\;\text{km}\;\text{s}^{-1}\;\text{Mpc}^{-1}\)，与明亮信号GW170817结合时为\(H_0=73.1^{+11.9}_{-8.5}\;\text{km}\;\text{s}^{-1}\;\text{Mpc}^{-1}\)。本研究展示了深度星系目录在GW宇宙学中的应用，突出了关键挑战和方法。
英文摘要：
Gravitational wave (GW) standard sirens enable independent measurements of the Hubble constant $H_0$. In the absence of electromagnetic counterparts, the 'dark siren' method statistically correlates GW events with potential host galaxies. We present a measurement of $H_0$ using GWTC-4.0 (the fourth Gravitational-Wave Transient Catalogue) combined with the Dark Energy Survey Year 6 Gold photometric galaxy catalogue. Using the gwcosmo pipeline, we jointly infer cosmological and GW population parameters. We analyse the impact of galaxy catalogue properties on the inference, identifying significant features in the galaxy redshift distribution which can introduce biases. By restricting the galaxy catalogue to $0.05<z<0.50$ to maintain consistency with a uniform in comoving volume galaxy distribution, we obtain a result of $H_0 = 71.7^{+22.7}_{-18.3}\;\text{km}\;\text{s}^{-1}\;\text{Mpc}^{-1}$ from dark sirens and $H_0=73.1^{+11.9}_{-8.5}\;\text{km}\;\text{s}^{-1}\;\text{Mpc}^{-1}$ when combined with the bright siren GW170817. This study demonstrates the adaptation of deep galaxy catalogues for GW cosmology, highlighting key challenges and methodologies essential for maximizing the potential of next-generation galaxy surveys.
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