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arXiv 2310.13629gr-qc
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作为更好暗警报器的进动双黑洞

Precessing Binary Black Holes as Better Dark Sirens

Qianyun Yun, Wen-Biao Han, Qian Hu, Haiguang Xu

AI总结:

研究进动对第三代引力波探测器双黑洞事件距离估计的影响,发现进动可将距离推断精度提高一个数量级,从而更精确测量哈勃常数,使其成为高精度宇宙探针。

摘要:

来自双黑洞并合的引力波(GWs)为宇宙学推断提供了独特的机会,例如标准警报器。然而,事件光度距离的准确测定受到距离与双星轨道角动量和观测者视线之间夹角相关性的限制。在这封信中,我们研究了进动对第三代(3G)引力波探测器双黑洞事件距离估计的影响。我们发现,与无进动的情况相比,进动可以将距离推断的精度提高一个数量级。由于距离测量的改善,对宿主星系的约束可以得到加强,因此哈勃常数可以用更高的精度和准确度进行测量。这些发现强调了进动对3G地面引力波探测器距离估计精度的显著影响,这些探测器可以作为探测宇宙的高精度探针。

英文摘要:

Gravitational waves (GWs) from binary black hole mergers provide unique opportunities for cosmological inference such as standard sirens. However, the accurate determination of the luminosity distance of the event is limited by the correlation between the distance and the angle between the binary's orbital angular momentum and the observer's line of sight. In the letter, we investigate the effect of precession on the distance estimation of binary black hole events for the third-generation (3G) GW detectors. We find that the precession can enhance the precision of distance inference by one order of magnitude compared to the scenario where precession is absent. The constraint on the host galaxies can be improved due to the improved distance measurement, therefore the Hubble constant can be measured with higher precision and accuracy. These findings underscore the noteworthy impact of precession on the precision of distance estimation for 3G ground-based GW detectors, which can serve as highly accurate probes of the Universe.

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