Multiband gravitational wave cosmography with dark sirens
Multiband gravitational wave cosmography with dark sirens
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DOI：
10.1103/physrevd.108.044038
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发表时间：
2022-08
影响因子：
5
通讯作者：
Brian C Seymour;Hang Yu;Yanbei Chen
中科院分区：
文献类型：
--
作者：
Brian C Seymour;Hang Yu;Yanbei Chen
引力波可能有助于解决哈勃常数的早期和晚期宇宙测量之间的紧张关系，正如我们将在本研究中所展示的那样，这种可能性可以通过分赫兹波段的引力波探测器来增强。这种探测器特别适合于在空间和地面之间对恒星质量黑洞双星进行多波段观测，由于定时三角测量的基线较长，这将大大提高源定位精度，从而促进“黑暗警报“宇宙学。提出的分贝概念包括DECIGO/B-DECIGO、TianGO等。我们认为在这里的前景，多波段观测的黑暗塞壬二进制与各种网络配置。我们发现，一个多波段观测可以唯一地确定一个黑洞二进制到一个星系的宇宙学距离，因此，一个黑暗的警笛的行为，如果它有一个电磁对应。考虑到只有完全本地化的暗塞壬，我们使用Fisher矩阵的方法来估计误差的哈勃常数和物质密度参数。我们发现，分赫兹探测器大大提高了我们测量宇宙学参数的能力，因为它使宿主星系被确定出一个更大的距离，而无需系统的统计技术的基础上比较人口分布。
Gravitational waves might help resolve the tension between early and late Universe measurements of the Hubble constant, and this possibility can be enhanced with a gravitational wave detector in the decihertz band as we will demonstrate in this study. Such a detector is particularly suitable for the multiband observation of stellar-mass black hole binaries between space and ground, which would significantly improve the source localization accuracy thanks to a long baseline for timing triangulation, hence promoting the"dark siren"cosmology. Proposed decihertz concepts include DECIGO/B-DECIGO, TianGO, and others. We consider here the prospects of multiband observation of dark siren binaries with a variety of network configurations. We find that a multiband observation can uniquely identify a black hole binary to a single galaxy to a cosmological distance, and thus a dark siren behaves as if it had an electromagnetic counterpart. Considering only fully localized dark sirens, we use a Fisher matrix approach to estimate the error in the Hubble constant and matter density parameter. We find that a decihertz detector substantially improves our ability to measure cosmological parameters because it enables host galaxies to be identified out to a larger distance without the systematics from statistical techniques based on comparing the population distribution.