Reconstructing phenomenological distributions of compact binaries via gravitational wave observations
Reconstructing phenomenological distributions of compact binaries via gravitational wave observations
复制标题
DOI：
10.1103/physrevd.100.043012
复制
发表时间：
2018-05
影响因子：
5
通讯作者：
D. Wysocki;J. Lange;R. O’Shaughnessy
中科院分区：
文献类型：
--
作者：
D. Wysocki;J. Lange;R. O’Shaughnessy
引力波测量将提供深入了解整个宇宙的合并致密双星的人口。我们描述并展示了一个灵活的参数方法来推断事件率作为一个紧凑的二进制参数的函数，占泊松误差和选择偏差。使用基于LIGO和Virgo的O3运行预测的具体合成数据，我们讨论了GW测量在不久的将来如何约束合并中子星和黑洞的质量和自旋分布，在这项工作中描述的几个唯象模型的背景下。我们证明，只有几十个事件可以使天体物理上的重要约束的自旋大小和方向分布的BH合并双星。我们讨论天体物理学先验或其他测量如何为未来测量的解释提供信息。使用公开的结果，我们估计事件率与质量的二元黑洞。为了与以前发表的工作相联系，我们提供了包括报告的O2 BBH候选者的估计，对网络的敏感性和报告的事件集的复杂性进行了几个毫无根据但简化的假设。与先前的工作一致，我们发现双星中的黑洞可能具有低的纳塔尔自旋。根据现有的结果和有利于低自旋的人口，我们目前无法限制二元黑洞人口的典型失调。本工作中描述的所有工具都是公开可用的，可以随时使用来解释真实的或合成的LIGO数据，并合成未来观测运行的预测数据。
Gravitational wave measurements will provide insight into the population of coalescing compact binaries throughout the universe. We describe and demonstrate a flexible parametric method to infer the event rate as a function of compact binary parameters, accounting for Poisson error and selection biases. Using concrete synthetic data based on projections for LIGO and Virgo's O3 run, we discuss how well GW measurements could constrain the mass and spin distribution of coalescing neutron stars and black holes in the near future, within the context of several phenomenological models described in this work. We demonstrate that only a few tens of events can enable astrophysically significant constraints on the spin magnitude and orientation distribution of BHs in merging binaries. We discuss how astrophysical priors or other measurements can inform the interpretation of future measurements. Using publicly-available results, we estimate the event rate versus mass for binary black holes. To connect to previously-published work, we provide estimates including reported O2 BBH candidates, making several unwarranted but simplifying assumptions for the sensitivity of the network and compleness of the reported set of events. Consistent with prior work, we find BHs in binaries likely have low natal spin. With available results and a population favoring low spin, we can't presently constrain the typical misalignments of the binary black hole population. All of the tools described in this work are publicly available and ready-to-use to interpret real or synthetic LIGO data, and to synthesize projected data from future observing runs.