Two-Dimensional Correlation Function of Binary Black Hole Coalescences
Two-Dimensional Correlation Function of Binary Black Hole Coalescences
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DOI：
10.3390/universe6070093
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发表时间：
2020-05
期刊：
影响因子：
2.9
通讯作者：
M. Cavaglià;Ashini Modi
中科院分区：
文献类型：
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作者：
M. Cavaglià;Ashini Modi
我们计算了LIGO-Virgo第一次和第二次观测运行中双黑洞合并探测的二维相关函数。通过将观测到的相关函数与两个参考函数进行比较，测试了二元黑洞合并事件的天空分布在不同角度尺度下的相关性，这两个参考函数是从均匀分布在天空中的定位误差区域的模拟数据集获得的。在3- σ置信水平下，关联函数的幂律斜率为γ = 2.24 ± 0.33，与星系分布的测量值一致。
We compute the two-dimensional correlation functions of the binary black hole coalescence detections in LIGO-Virgo’s first and second observation runs. The sky distribution of binary black hole coalescence events is tested for correlations at different angular scales by comparing the observed correlation function to two reference functions that are obtained from mock datasets of localization error regions uniformly distributed in the sky. No excess correlation at any angular scale is found. The power-law slope of the correlation function is estimated to be γ = 2.24 ± 0.33 at the three- σ confidence level, a value consistent with the measured distribution of galaxies.