CMB spectral distortions from black holes formed by vacuum bubbles

CMB spectral distortions from black holes formed by vacuum bubbles
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真空气泡形成的黑洞造成的 CMB 光谱畸变

DOI:
10.1088/1475-7516/2018/07/059
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发表时间:
2018
影响因子:
6.4
通讯作者:
Yamada, Masaki
Yamada, Masaki
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Deng, Heling;Vilenkin, Alexander;Yamada, Masaki

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真空泡可能在宇宙膨胀期间成核和膨胀。当膨胀结束时,气泡进入周围的等离子体,产生强烈的冲击,随后是向外传播的低密度波。气泡本身最终形成质量分布广泛的黑洞。最近有人提出,这样的黑洞可以解释LIGO观测,并可能为在银河系中心观测到的超大质量黑洞提供种子。它们也可能提供相当大的一部分甚至全部的暗物质。我们估计了膨胀激波和欠密度引起的宇宙微波背景谱的μ-畸变。在天空中平均的预测失真远低于当前的界限,但由于最大的黑洞的局部峰值对模型参数施加了限制。
Vacuum bubbles may nucleate and expand during the cosmic inflation. When inflation ends, the bubbles run into the ambient plasma, producing strong shocks followed by underdensity waves, which propagate outwards. The bubbles themselves eventually form black holes with a wide distribution of masses. It has been recently suggested that such black holes may account for LIGO observations and may provide seeds for supermassive black holes observed at galactic centers. They may also provide a significant part or even the whole of the dark matter. We estimate the spectral μ-distortion of the CMB induced by expanding shocks and underdensities. The predicted distortions averaged over the sky are well below the current bounds, but localized peaks due to the largest black holes impose constraints on the model parameters.
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