arXiv 1902.025502019-02-07astro-ph.COgr-qc

低能量下的量子引力探测

Probing quantum gravity at low energies

Justine Tarrant, Geoff Beck, Sergio Colafrancesco

备注：: 6 pages, 1 figure. Submitted to Proceedings of the South African Institute of Physics Annual Conference, 2018

摘要：

当一个黑洞中的物质层坍缩到普朗克密度时，普朗克星就形成了，普朗克密度大致相当于质量被压缩到接近质子的体积大小，并向外反弹。这些普朗克恒星被认为是快速射电暴和短伽马射线暴的原因，同时提供了一个相对低能量的量子引力视角。观测这样的事件需要黑洞质量比太阳质量小得多，这可以通过原始黑洞暗物质模型来提供。我们讨论了低能各向同性的背景辐射产生的衰减原始黑洞在所有的时代和来自河外背景光的光谱的限制。我们发现，为了避免超过已知的河外背景光的排放，我们必须限制在低频发出的普朗克恒星爆炸在本时代的总能量小于$10^{13}$尔格或限制原始黑洞人口远远低于任何现有的限制。这让人们怀疑普朗克恒星的爆炸是否真的可以解释快速射电暴，就像文献中推测的那样。

英文摘要：

Planck stars form when a collapsing shell of matter within a black hole reaches the Planck density, roughly equivalent to the mass being compressed into a volumetric size near that of the proton, and rebounds outwards. These planck stars have been considered as accounting for both fast radio bursts and short gamma ray bursts, whilst offering a comparatively low energy perspective onto quantum gravity. The observation of such an event would require black hole masses much smaller than a solar mass, which could be provided by primordial black hole dark matter models. We discuss the low energy isotropic background emissions produced by decaying primordial black holes at all epochs and derive constraints from the spectrum of the extragalactic background light. We find that, in order to avoid exceeding known extragalactic background light emissions, we must restrict the total energy emitted at low frequencies by a planck star exploding in the present epoch to be less than $10^{13}$ erg or restrict the primordial black hole population far below any existing limits. This casts doubt on whether exploding planck stars could actually account for fast radio bursts, as they are speculated to in the literature.

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摘要：

英文摘要：

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