Primordial features from linear to nonlinear scales
Primordial features from linear to nonlinear scales
复制标题
DOI：
10.1103/physrevresearch.1.033209
复制
发表时间：
2019-06
期刊：
影响因子：
--
通讯作者：
F. Beutler;M. Biagetti;D. Green;A. Slosar;B. Wallisch
中科院分区：
文献类型：
--
作者：
F. Beutler;M. Biagetti;D. Green;A. Slosar;B. Wallisch
原始功率谱中的尖锐特征是进入暴胀时代的一个强有力的窗口。到目前为止，宇宙微波背景辐射（CMB）提供了最敏感的途径来寻找这些签名。在本文中，我们展示了大规模结构观测的力量，超越了CMB作为原始特征的探测。我们表明，在星系调查的签名可以从宽带功率谱分离，并作为标准的重子声学振荡的非线性演化的物质是强大的。因此，分析可以利用数据集中可用的线性范围之外的大量尺度。我们开发了一个大尺度结构的特征搜索，将其应用于重子振荡光谱调查的最终数据发布，并找到新的振荡特征的界限，超过普朗克的灵敏度的一个显着的频率范围。此外，我们预测，下一代的星系调查，如DESI和欧几里得，将能够改善目前的限制高达一个数量级的频率范围扩大。
Sharp features in the primordial power spectrum are a powerful window into the inflationary epoch. To date, the cosmic microwave background (CMB) has offered the most sensitive avenue to search for these signatures. In this paper, we demonstrate the power of large-scale structure observations to surpass the CMB as a probe of primordial features. We show that the signatures in galaxy surveys can be separated from the broadband power spectrum and are as robust to the nonlinear evolution of matter as the standard baryon acoustic oscillations. As a result, analyses can exploit a significant range of scales beyond the linear regime available in the datasets. We develop a feature search for large-scale structure, apply it to the final data release of the Baryon Oscillation Spectroscopic Survey and find new bounds on oscillatory features that exceed the sensitivity of Planck for a significant range of frequencies. Moreover, we forecast that the next generation of galaxy surveys, such as DESI and Euclid, will be able to improve current constraints by up to an order of magnitude over an expanded frequency range.