比较重子声学振荡通过引力波自相关和与星系互相关的可探测性
Comparing the Detectability of the Baryon Acoustic Oscillation through Gravitational-Wave Autocorrelation and Cross-Correlation with Galaxies
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中文总结 AI 辅助
本研究比较了利用双黑洞并合引力波事件的自相关与和星系互相关探测重子声学振荡尺度的能力，发现互相关方法在信噪比和精度上均优于自相关。
中文摘要 AI 辅助
致密双星并合产生的引力波辐射的振幅和波形形状使得能够直接测量这些事件的光度距离，使它们成为“标准警笛”。双黑洞（BBH）并合构成了这些标准警笛的重要部分。大量的BBH并合事件目录可用于探测宇宙学和大尺度结构性质，如重子声学振荡（BAO）。在这项工作中，我们探索利用BBH并合与星系目录之间的互相关来探测BAO尺度，并将其与第三代探测器观测的BBH自相关进行比较。在10年的观测期内，这些天文台将在10平方度范围内定位约1.5×10^5个事件，信噪比（SNR）≥50，光度距离不确定性≤50 Mpc，并将能够恢复BAO尺度。我们发现，与自相关相比，通过互相关恢复BAO尺度的信噪比约为两倍，且精度显著更高。
英文摘要
The amplitude and waveform shape of gravitational wave radiation from compact binary mergers enable a direct measurement of the luminosity distance to these events, making them \textit{``standard sirens''}. Binary black hole (BBH) mergers form a significant fraction of these standard sirens. A substantial catalog of BBH merger events can be used to probe cosmology and large-scale structure properties, such as the baryon acoustic oscillations (BAO). In this work, we explore detecting the BAO scale using the cross-correlation between BBH mergers and a galaxy catalog, and compare it with the BBH autocorrelation for the third-generation detector observations. Over a $10$-year observation period, these observatories will localize approximately $1.5\times10^{5}$ events within $10$ square degrees, with \snr $\geq 50$ and luminosity distance uncertainty $\leq 50$ Mpc, and will allow recovery of the BAO scale. We find that the BAO scale is recovered with approximately two times the \snr and a significantly better precision through cross-correlation as compared to autocorrelation.
发表机构
- Cotton University（科顿大学）
- KAGRA Observatory, Institute for Cosmic Ray Research, The University of Tokyo（宇宙线研究所KAGRA天文台，东京大学）
- Inter-University Centre for Astronomy and Astrophysics（天体物理学与天文学大学间中心）
- Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo（东京大学 Kavli 宇宙物理与数学研究所（WPI））
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