论文标题
使用宇宙重组辐射来探测早期的暗能量和基本的恒定变化
Using the cosmological recombination radiation to probe early dark energy and fundamental constant variations
论文作者
论文摘要
宇宙重组辐射（CRR）是早期宇宙中保证的光谱失真信号之一。来自氢气和氦气预期的CRR光子是最后一个散射过程，因此可以在预聚类时代进行探测物理现象。在这里，我们计算了早期的暗能量模型和不同基本常数引起的CRR的修改。这些新的物理学实例已经看到了与哈勃张力有关的最近活动，激发了此处介绍的探索性研究。相关的CRR响应频谱富含，但信号的水平很小。我们预测未来光谱仪对这些影响的可能敏感性。我们的估计表明，CRR直接取决于预聚类时代的扩张历史和重组物理学的变化。但是，仅光谱仪与其他宇宙学探针竞争的仅限敏感性是必需的。然而，CRR的测量可以直接进入否则无法接近的阶段，这突出了这些类型的观测可能会作为早期宇宙的探测所具有的潜力。与$ {\ it planck} $数据的组合进一步表明，协同方法非常有前途。
The cosmological recombination radiation (CRR) is one of the guaranteed spectral distortion signals from the early Universe. The CRR photons from hydrogen and helium pre-date the last scattering process and as such allow probing physical phenomena in the pre-recombination era. Here we compute the modifications to the CRR caused by early dark energy models and varying fundamental constants. These new physics examples have seen increased recent activity in connection with the Hubble tension, motivating the exploratory study presented here. The associated CRR responses are spectrally-rich but the level of the signals is small. We forecast the possible sensitivity of future spectrometers to these effects. Our estimates demonstrate that the CRR directly depends to changes in the expansion history and recombination physics during the pre-recombination era. However, futuristic sensitivities are required for spectrometer-only constraints that are competitive with other cosmological probes. Nevertheless, measurements of the CRR can directly reach into phases that otherwise remain inaccessible, highlighting the potential these types of observations could have as a probe of the early Universe. A combination with ${\it Planck}$ data further shows that a synergistic approach is very promising.
