Primordial black holes in braneworld cosmologies: Accretion after formation
Primordial black holes in braneworld cosmologies: Accretion after formation
复制标题
膜世界宇宙学中的原始黑洞：形成后的吸积
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
A. Liddle
中科院分区：
文献类型：
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作者：
Raf Guedens;D. Clancy;A. Liddle
我们最近研究了一个简单的膜世界宇宙学，即兰德尔Sundrum II型宇宙学中的原始黑洞的形成和蒸发。在这里，我们研究的效果吸积从宇宙学背景的黑洞形成后。虽然一般认为在标准宇宙学中，这种吸积的重要性可以忽略不计，但我们发现，在膜世界宇宙学的高能区域，吸积可能是主要的影响，并导致潜在数量级的质量增加。然而，不幸的是，增长是指数敏感的吸积效率，这是不能准确地确定。由于一旦高能区域结束，吸积就变得不重要了，它不会影响黑洞蒸发时所表达的任何约束，但它可以改变对早期宇宙形成速率的约束的解释。
We recently studied the formation and evaporation of primordial black holes in a simple braneworld cosmology, namely the Randall-Sundrum type II cosmology. Here we study the effect of accretion from the cosmological background onto the black holes after formation. While it is generally believed that in the standard cosmology such accretion is of negligible importance, we find that during the high-energy regime of braneworld cosmology accretion can be the dominant effect and lead to a mass increase of potentially orders of magnitude. However, unfortunately the growth is exponentially sensitive to the accretion efficiency, which cannot be determined accurately. Since accretion becomes unimportant once the high-energy regime is over, it does not affect any constraints expressed at the time of black hole evaporation, but it can change the interpretation of those constraints in terms of early Universe formation rates.