科学与TianQin天文台：恒星质量双黑洞的初步结果
Science with the TianQin observatory: Preliminary results on stellar-mass binary black holes
摘要：
研究了利用天琴探测恒星质量双星黑洞（SBBH）的前景。我们估计预期的检测数量以及SBBH吸气参数估计的精度，使用五种不同的人口模型。我们注意到天琴可能检测到一些信噪比大于12的SBBH吸气;降低阈值和组合多个检测器都可以提高检测数量。对于检测阈值以上的大多数事件，源参数可以以良好的精度恢复。例如，合并时间的精度最有可能出现在1 s附近，从而可以引导地基探测器的探测，偏心率$e_0$的精度最有可能出现在$10^{-4}$附近，从而可以区分地层通道，质量参数的精度一般优于$10^{-6}$，最有可能出现在$10^{-7}$附近。我们特别注意到，对于一个典型的合并事件，误差体积很可能小到只包含宿主星系，这对引力波宇宙学的研究以及多信使观测的相关研究有很大的帮助。
英文摘要：
We study the prospect of using TianQin to detect stellar-mass binary black holes (SBBHs). We estimate the expected detection number as well as the precision of parameter estimation on SBBH inspirals, using five different population models. We note TianQin can possibly detect a few SBBH inspirals with signal to noise ratios greater than 12; lowering the threshold and combining multiple detectors can both boost the detection number. The source parameters can be recovered with good precision for most events above the detection threshold. For example, the precision of the merger time most likely occurs near 1s, making it possible to guide the detection of the ground-based detectors, the precision of the eccentricity $e_0$ most likely occurs near $10^{-4}$, making it possible to distinguish the formation channels, and the precision of the mass parameter is better than $10^{-6}$ in general and most likely occurs near $10^{-7}$. We note, in particular, that for a typical merger event, the error volume is likely to be small enough to contain only the host galaxy, which could greatly help in the study of gravitational wave cosmology and relevant studies through the multimessenger observation.
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