Digging the population of compact binary mergers out of the noise

Digging the population of compact binary mergers out of the noise
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从噪音中挖掘紧凑二元合并的群体

DOI:
10.1093/mnras/stz225
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发表时间:
2018
影响因子:
4.8
通讯作者:
W. Farr
W. Farr
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
S. Gaebel;J. Veitch;T. Dent;W. Farr

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发射引力波(GW)信号的合并致密双星,最近由 先进的LIGO-Virgo网络,构成了多维空间的人口 分量的质量和自旋,红移,和其他参数。描述这个群体的特征 是GW观测的一个主要目标,可以通过参数模型来实现。我们证明了 这种模型的分层推理方法,考虑到 每个二元合并的个体参数,对于质量依赖的选择效应,以及 用于检测由检测器噪声引起的候选事件的第二群体的存在。因此,在本发明中, 该方法对污染样品的潜在偏差具有鲁棒性, 来自天体物理起源概率相对较小的事件的信息。
Coalescing compact binaries emitting gravitational wave (GW) signals, as recently detected by the Advanced LIGO-Virgo network, constitute a population over the multi-dimensional space of component masses and spins, redshift, and other parameters. Characterizing this population is a major goal of GWobservations and may be approached via parametric models.We demonstrate hierarchical inference for such models with a method that accounts for uncertainties in each binary merger’s individual parameters, for mass-dependent selection effects, and also for the presence of a second population of candidate events caused by detector noise. Thus, the method is robust to potential biases from a contaminated sample and allows us to extract information from events that have a relatively small probability of astrophysical origin.
DOI: 10.3847/1538-4357/aa8f50
发表时间: 2017-05
期刊: The Astrophysical Journal
影响因子: --
作者:
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发表时间: 2015-06-20
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