论文标题
转向后的轴承等效性扰动面向CMB和大规模结构
Post-inflationary axion isocurvature perturbations facing CMB and large-scale structure
论文作者
论文摘要
暗物质由升降后场景中的重组机制产生的轴状颗粒（ALP）组成，导致原始的异位效应波动。这些波动的功率光谱对于小波数是平坦的，延伸到可通过宇宙学调查访问的尺度。我们使用宇宙微波背景（CMB）主要各向异性的最新测量结果，以及CMB镜头，Baryonic声学振荡（BAO）和Sunyaev Zel'Dovich（SZ）群集数，以测量等效性组件的幅度和倾斜度。我们发现偏爱CMB主要各向异性中的白色噪声异位膜分量。但是，当前的大规模结构（LSS）数据削弱了这一结论。将结果解释为对等离子组件的保守上限，所有探针的ALP质量上的组合结合是$ m_ {a} \ gtrsim 10^{ - 19} $ eV，并且依赖于$ m_ {a} $随温度演变。未来LSS实验和CMB镜头的宇宙剪切和星系聚集的预期敏感性表明，$ M_ {a} \ gtrsim 10^{ - 18} $ 10^{ - $ 10^{ - $ 10^{ - 13} $ eV的提高界限，取决于避免使用非层次的削减，以避免使用非层次级别的依赖性依赖性依赖性。
Dark matter comprised of axion-like particles (ALPs) generated by the realignment mechanism in the post-inflationary scenario leads to primordial isocurvature fluctuations. The power spectrum of these fluctuations is flat for small wave numbers, extending to scales accessible with cosmological surveys. We use the latest measurements of Cosmic Microwave Background (CMB) primary anisotropies together with CMB lensing, Baryonic Acoustic Oscillations (BAO) and Sunyaev Zel'dovich (SZ) cluster counts to measure the amplitude and tilt of the isocurvature component. We find preference for a white-noise isocurvature component in the CMB primary anisotropies; this conclusion is, however, weakened by current large-scale structure (LSS) data. Interpreting the result as a conservative upper limit on the isocurvature component, the combined bound on the ALP mass from all probes is $m_{a} \gtrsim 10^{-19}$ eV, with some dependence on how $m_{a}$ evolves with temperature. The expected sensitivity of cosmic shear and galaxy clustering from future LSS experiments and CMB lensing suggests improved bounds of $m_{a} \gtrsim 10^{-18}$-$10^{-13}$ eV, depending on scale cuts used to avoid non-linearities and the ALP mass-temperature dependence.
