论文标题
来自黑暗时代的21厘米功率谱上原始非高斯的签名
Signature of primordial non-Gaussianity on 21-cm power spectrum from dark ages
论文作者
论文摘要
我们研究了黑暗时代的21厘米线差异温度温度的功率谱上的原始非高斯语的特征。通过采用重力聚类的扰动处理，我们定量估计非高斯和一环校正对21-CM功率谱的影响。根据Fisher矩阵分析，研究了使用21-CM功率谱对局部原始型非高斯性限制的潜在影响。我们的结果表明，与宇宙微波背景测量值及其约束功率相比，基线的21 cm功率谱可能会将原始非高斯的基线限制在一个比水平上，而其限制功率比21 cm Bispectrum更强，而在21 cm Biseppectrum中则最终变得更加强大。
We study the signature of primordial non-Gaussianity imprinted on the power spectrum of the 21-cm line differential brightness temperature during dark ages. Employing the perturbative treatment of gravitational clustering, we quantitatively estimate the effects of the non-Gaussian and one-loop corrections on the 21-cm power spectrum. The potential impact of the use of the 21-cm power spectrum for the constraint on local-type primordial non-Gaussianity is investigated based on the Fisher matrix analysis. Our results show that the 21-cm power spectrum for an array with a baseline of several tens of kilometers can constrain the primordial non-Gaussianity to a level severer than that from cosmic microwave background measurements and its constraining power is stronger than that of the 21-cm bispectrum, while in the ultimate situation the 21-cm bispectrum eventually becomes more powerful.
