Binary Black Hole Mergers in the First Advanced LIGO Observing Run
Binary Black Hole Mergers in the First Advanced LIGO Observing Run
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DOI：
10.1103/physrevx.6.041015
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发表时间：
2016-10-21
影响因子：
12.5
通讯作者：
Zweizig, J.
中科院分区：
文献类型：
--
作者：
Abbott, B. P.;Abbott, R.;Zweizig, J.
从2015年9月12日到2016年1月19日，高级LIGO探测器的第一次观测运行，首次探测到了来自双星黑洞合并的引力波。在这篇文章中，我们给出了总质量达100m的二元黑洞合并信号的全部搜索结果。以及我们对这些系统的观察所带来的详细影响。我们的搜索基于来自双黑洞系统的引力波信号的广义相对论模型，明确地识别出两个信号，GW150914和GW151226，在观测期间的重要性大于5西格玛。它还发现了第三个可能的信号，LVT151012，其重要性大大降低，有87%的可能性是天体物理起源。我们提供了对观察到的系统参数的详细估计。GW150914和GW151226都为研究致密天体双星在大速度、高度非线性区域的两体运动提供了一个前所未有的机会。我们没有观察到任何偏离广义相对论的情况，我们对几个高阶后牛顿系数设定了改进的经验界。根据我们的观测，我们推断恒星-质量二元黑洞合并率在9-240gpc(-3)yr(-1)的范围内。这些观测开始为天体物理学对双星黑洞形成速率的预测提供信息，并表明高级探测器网络未来的观测运行将产生更多引力波探测。
The first observational run of the Advanced LIGO detectors, from September 12, 2015 to January 19, 2016, saw the first detections of gravitational waves from binary black hole mergers. In this paper, we present full results from a search for binary black hole merger signals with total masses up to 100M. and detailed implications from our observations of these systems. Our search, based on general-relativistic models of gravitational-wave signals from binary black hole systems, unambiguously identified two signals, GW150914 and GW151226, with a significance of greater than 5 sigma over the observing period. It also identified a third possible signal, LVT151012, with substantially lower significance and with an 87% probability of being of astrophysical origin. We provide detailed estimates of the parameters of the observed systems. Both GW150914 and GW151226 provide an unprecedented opportunity to study the two-body motion of a compact-object binary in the large velocity, highly nonlinear regime. We do not observe any deviations from general relativity, and we place improved empirical bounds on several highorder post-Newtonian coefficients. From our observations, we infer stellar-mass binary black hole merger rates lying in the range 9-240 Gpc(-3) yr(-1). These observations are beginning to inform astrophysical predictions of binary black hole formation rates and indicate that future observing runs of the Advanced detector network will yield many more gravitational-wave detections.