发表机构
The Chinese University of Hong Kong (CUHK)(香港中文大学)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
本评论针对Huang等人声称仅用透镜红移即可从透镜化引力波测量哈勃常数的研究,通过指出其结论与引力波透镜系统参数简并性研究矛盾,证明仅靠透镜红移无法测量哈勃常数。
AI 中文摘要
在Huang等人(JCAP08(2023)003)的研究中,其声称即便没有引力波(GW)源红移或爱因斯坦半径(透镜的角大小)的信息,只要能独立提供透镜红移,就可从透镜化引力波中约束哈勃常数。为验证这一点,作者建立了奇异等温球透镜模型,并对注入的透镜化引力波应用费舍尔信息矩阵和贝叶斯参数估计。然而,他们的结论与我们此前关于引力波透镜系统参数简并性的研究相矛盾。在本评论中,我们证明在缺乏源红移或(爱因斯坦半径)的情况下,仅靠透镜红移无法测量哈勃常数。
英文摘要
In Huang et al (JCAP08(2023)003), the work claimed that the Hubble constant can be constrained from lensed gravitational waves, despite the absence of information on GW source redshift or Einstein radius (angular size of the lens), as long as lens redshift is provided independently. To demonstrate, the authors set up a singular isothermal sphere lens model and applied Fisher information matrix and Bayesian parameter estimation on injected lensed GWs. However, their conclusion contradicts our previous work on degeneracies of GW lens system parameters. In this comment, we illustrate that Hubble constant cannot be measured with lens redshift alone, in the absence of source redshift or (Einstein radius).
CommentsComment on arXiv:2304.10435