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arXiv 2007.04271astro-ph.CO
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不完整性无关紧要:从BBH-星系互相关推断$H_0$

Incompleteness Matters Not: Inference of $H_0$ from BBH-galaxy cross-correlations

Sayantani Bera, Divya Rana, Surhud More, Sukanta Bose

摘要:

我们展示了引力波标准塞壬和已知红移的星系之间的角聚类如何允许哈勃常数的推断,无论这些塞壬的宿主星系是否存在于星系目录中。我们证明了这一点,第一次与现实的模拟引力波信号从二进制黑洞在一个三探测器网络与先进的LIGO和先进的处女座灵敏度。我们表明,有了这样的网络,互相关技术可以用来推断哈勃参数的精度小于10%(2%),在90%的置信度与50(500)源,甚至与100%不完整的目录,其中不包含任何引力波事件的主机。我们比较我们的方法与当前国家的最先进的技术用于从实际数据的哈勃参数的推断。我们认为,如果聚类信息不显式使用,$H_0$从真实数据的推断,预计将是优先主导的。

英文摘要:

We show how the angular clustering between gravitational-wave standard sirens and galaxies with known redshifts allows an inference of the Hubble constant, regardless of whether the host galaxies of any of these sirens are present in the galaxy catalog. We demonstrate this for the first time with realistic simulations of gravitational-wave signals from binary black holes in a three-detector network with Advanced LIGO and Advanced Virgo sensitivities. We show that with such a network, the cross-correlation technique can be used to infer the Hubble parameter with a precision of less than 10% (2%) at 90% confidence with 50 (500) sources, even with a 100% incomplete catalog, which does not contain the hosts of any of the gravitational-wave events. We compare our method with the current state-of-the-art techniques used for the inference of the Hubble parameter from real data. We argue that, if the clustering information is not used explicitly, the inference of $H_0$ from real data is expected to be prior-dominated.

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