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arXiv 1503.04307gr-qc
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利用引力波探测致密双星的形成通道

Use of gravitational waves to probe the formation channels of compact binaries

Salvatore Vitale, Ryan Lynch, Riccardo Sturani, Philip Graff

摘要:

随着双星黑洞并合GW 150914的发现,引力波天体物理学的时代已经开始。在未来的几个月和几年里,LIGO和Virgo将大量探测到致密双星合并发出的引力波信号。关于致密双星的许多信息仍然不确定,包括它们形成通道的一些关键细节。这两种情况下,通常认为,共同的信封演变和动态捕获,导致不同的分布的黑洞自旋的方向。特别是,共同的包络演变预计将是非常有效的对齐自旋与轨道角动量。在本文中,我们模拟目录的引力波信号,其中一个给定的分数的事件来自共同的包络演化,并有自旋几乎对齐的轨道角动量。我们展示了如何对齐系统的分数可以准确地估计使用贝叶斯参数估计,1 $σ$的不确定性的顺序为10%后,检测到100-200个来源。

英文摘要:

With the discovery of the binary black hole coalescence GW150914, the era of gravitational-wave astrophysics has started. Gravitational-wave signals emitted by compact binary coalescences will be detected in large number by LIGO and Virgo in the coming months and years. Much about compact binaries is still uncertain, including some key details about their formation channels. The two scenarios which are typically considered, common envelope evolution and dynamical capture, result in different distributions for the orientation of the black hole spins. In particular, common envelope evolution is expected to be highly efficient in aligning spins with the orbital angular momentum. In this paper we simulate catalogs of gravitational-wave signals in which a given fraction of events comes from common envelop evolution, and has spins nearly aligned with the orbital angular momentum. We show how the fraction of aligned systems can be accurately estimated using Bayesian parameter estimation, with 1 $σ$ uncertainties of the order of 10% after 100-200 sources are detected.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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