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arXiv 0909.1738astro-ph.COgr-qc
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二元原初黑洞的快速合并:对GW150914的一个启示

Rapid Merger of Binary Primordial Black Holes: an Implication for GW150914

Kimitake Hayasaki, Keitaro Takahashi, Yuuiti Sendouda, Shigehiro Nagataki

摘要:

我们提出了一个新的方案,一个二元的原始黑洞(PBH)的演变。我们认为一个动力学摩擦环境暗物质,散射的暗物质粒子与一个高度偏心的轨道,除了标准的两体松弛过程,以填补损失锥,和相互作用之间的二进制和一个circumbinary磁盘,假设PBH不构成大部分的暗物质。通过这些过程,二元PBH损失能量和角动量,这对于典型的配置来说是足够有效的。这样的双星由于引力波的发射而在比宇宙年龄短得多的时间尺度上合并。我们估计了合成的引力波背景的密度参数。本文还讨论了中等质量到超大质量黑洞形成的天体物理意义。

英文摘要:

We propose a new scenario for the evolution of a binary of primordial black holes (PBHs). We consider a dynamical friction by ambient dark matter, scattering of dark matter particles with a highly eccentric orbit besides the standard two-body relaxation process to refill the loss cone, and interaction between the binary and a circumbinary disk, assuming that PBHs do not constitute the bulk of dark matter. Binary PBHs lose the energy and angular momentum by these processes, which could be sufficiently efficient for a typical configuration. Such a binary coalesces due to the gravitational wave emission in a time scale much shorter than the age of the universe. We estimate the density parameter of the resultant gravitational wave background. Astrophysical implication concerning the formation of intermediate-mass to supermassive black holes is also discussed.

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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