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arXiv 2108.04279astro-ph.CO
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PBH-ABH并合的随机引力波背景

Stochastic Gravitational Wave Background from PBH-ABH Mergers

Wenfeng Cui, Fei Huang, Jing Shu, Yue Zhao

摘要:

在Advanced LIGO上对双星黑洞合并产生的引力波的测量鼓励了对随机引力波背景的广泛研究。最近的研究集中在由相同物质组成的引力波源,例如来自二元原始黑洞的合并或来自二元天体物理黑洞的合并。本文研究了一种新的可能性--由一个原始黑洞和一个天体物理学黑洞合并产生的随机引力波背景。如果原始黑洞存在,这样的系统就必然存在。我们研究了宇宙历史中产生的各向同性引力波背景。我们发现检测这样的信号是非常具有挑战性的。我们还指出,由于双星的形成率很低,把银河系中这类双星产生的引力波当作方向性随机背景是不恰当的。

英文摘要:

The measurement of gravitational waves produced by binary black-hole mergers at the Advanced LIGO has encouraged extensive studies on the stochastic gravitational wave background. Recent studies have focused on gravitational wave sources made of the same species, such as mergers from binary primordial black holes or those from binary astrophysical black holes. In this paper, we study a new possibility -- the stochastic gravitational wave background produced by mergers of one primordial black hole and one astrophysical black hole. Such systems are necessarily present if primordial black holes exist. We study the isotropic gravitational wave background produced through the history of the Universe. We find it is very challenging to detect such a signal. We also demonstrate that it is improper to treat the gravitational waves produced by such binaries in the Milky Way as a directional stochastic background, due to a very low binary formation rate.

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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