论文标题
CMB III的光谱空间演变：传输功能，功率谱和Fisher预测
Spectro-spatial evolution of the CMB III: transfer functions, power spectra and Fisher forecasts
论文作者
论文摘要
在本文中，我们提供了宇宙宇宙中宇宙微波背景（CMB）的失真传递函数的首次计算，然后在本系列的纸I和II上进行了后续。我们说明了解决方案固有的物理效应，讨论并证明了扰动光子光谱的各种限制案例。我们阐明了失真传递函数与光子光谱本身之间的关系，提供了可以计算可约束的CMB信号功率谱的机械，包括单能注入和衰减粒子场景的光谱扭曲。我们的结果表明，$μ\ times t $和$ y \ y \ times t $ power谱覆盖水平可以通过当前和将来的CMB实验来限制，而不会违反Cobe/Firas的现有限制。互相关信号的幅度直接取决于平均失真水平，因此从红移$ 10^3 \ sillesim z \ Lessim z \ Lessim 3 \ times 10^6 $和频率依赖性的CMB天空之间建立了原始等离子体状态之间的新基本联系。这提供了一种新的方法，可以使用CMB成像仪来限制平均早期能量释放。例如，我们在单能释放和腐烂的粒子场景上得出约束。这表明Litebird可能能够将Cobe/Firas的能量释放限制提高到$ \ simeq 2.5 $的一倍，而PICO可以将约束限制在一个以上的数量级以上。此外，此处考虑的信号还可能为从失真各向异性研究中对原始非陶斯的限制限制的限制限制带来重大挑战。我们的工作进一步凸显了对未来CMB测量和分析的协同光谱方法的巨大潜力。
In this paper, we provide the first computations for the distortion transfer functions of the cosmic microwave background (CMB) in the perturbed Universe, following up on paper I and II in this series. We illustrate the physical effects inherent to the solutions, discussing and demonstrating various limiting cases for the perturbed photon spectrum. We clarify the relationship between distortion transfer functions and the photon spectrum itself, providing the machinery that can then compute constrainable CMB signal power spectra including spectral distortions for single energy injection and decaying particle scenarios. Our results show that the $μ\times T$ and $y\times T$ power spectra reach levels that can be constrained with current and future CMB experiments without violating existing constraints from COBE/FIRAS. The amplitude of the cross-correlation signal directly depends on the average distortion level, therefore establishing a novel fundamental link between the state of the primordial plasma from redshift $10^3 \lesssim z\lesssim 3\times 10^6$ and the frequency-dependent CMB sky. This provides a new method to constrain average early energy release using CMB imagers. As an example we derive constraints on single energy release and decaying particle scenarios. This shows that LiteBIRD may be able to improve the energy release limits of COBE/FIRAS by up to a factor of $\simeq 2.5$, while PICO could tighten the constraints by more than one order of magnitude. The signals considered here could furthermore provide a significant challenge to reaching cosmic variance-limited constraints on primordial non-Gaussianity from distortion anisotropy studies. Our work further highlights the immense potential for a synergistic spectroscopic approach to future CMB measurements and analyses.
