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arXiv 1704.05073astro-ph.HEhep-ph
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引力波的“nu”观察:中微子的黑洞出生率与LIGO的合并率相结合

A "nu" look at gravitational waves: The black hole birth rate from neutrinos combined with the merger rate from LIGO

Jonathan H. Davis, Malcolm Fairbairn

摘要:

我们预测测量黑洞出生率从弥漫超新星中微子背景(DSNB)未来的中微子实验,并限制黑洞合并分数$ε$,结合信息的引力波实验,如LIGO的黑洞合并率。DSNB起源于宇宙中所有超新星发射的中微子,预计由两种成分组成:来自中子星形成超新星的中微子,以及来自黑洞形成“unnovae”的更高能量的次主导成分。我们进行马尔可夫链蒙特卡罗模拟数据的DSNB在类似于超神冈的实验分析,专注于这第二个组成部分。由于所有关于超新星中微子发射的知识都来自于对坍缩恒星的模拟,我们选择了两组先验:一组是对超新星有很好的理解,另一组是对它们的中微子发射知之甚少。通过将DSNB的黑洞出生率与LIGO的黑洞合并率的预计测量值相结合,我们表明,经过十年的超神冈实验,在$3 σ$置信度下,导致今天观测到的二元合并的黑洞比例$ε$可以被限制在$2 \cdot 10^{-4} \leq ε\leq 3 \cdot 10^{-2}$范围内。

英文摘要:

We make projections for measuring the black hole birth rate from the diffuse supernova neutrino background (DSNB) by future neutrino experiments, and constrain the black hole merger fraction $ε$, when combined with information on the black hole merger rate from gravitational wave experiments such as LIGO. The DSNB originates from neutrinos emitted by all the supernovae in the Universe, and is expected to be made up of two components: neutrinos from neutron-star-forming supernovae, and a sub-dominant component at higher energies from black-hole-forming "unnovae". We perform a Markov Chain Monte Carlo analysis of simulated data of the DSNB in an experiment similar to Hyper-Kamiokande, focusing on this second component. Since all knowledge of the neutrino emission from unnovae comes from simulations of collapsing stars, we choose two sets of priors: one where the unnovae are well-understood and one where their neutrino emission is poorly known. By combining the black hole birth rate from the DSNB with projected measurements of the black hole merger rate from LIGO, we show that the fraction of black holes which lead to binary mergers observed today $ε$ could be constrained to be within the range $2 \cdot 10^{-4} \leq ε\leq 3 \cdot 10^{-2}$ at $3 σ$ confidence, after ten years of running an experiment like Hyper-Kamiokande.

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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