ournal of C osmology and A stroparticle hysics J 21 cm angular power spectrum from minihalos as a probe of primordial spectral runnings
ournal of C osmology and A stroparticle hysics J 21 cm angular power spectrum from minihalos as a probe of primordial spectral runnings
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宇宙学和宇宙粒子物理学杂志 J 21 cm 迷你晕角功率谱作为原始光谱运行的探针
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通讯作者：
A. Palizban
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作者：
A. H. Shahreza;A. A. Jazi;E. Banitalebi;A. Palizban
.小晕21厘米谱线涨落的测量已被讨论为一个强有力的探测范围广泛的宇宙学模型。然而，以前的研究只考虑了像素方差，其中来自不同尺度的贡献被整合。为了从不同的尺度中提取信息，我们给出了不同红移的微晕21厘米线涨落的角功率谱，它可以极大地增强对微晕的约束能力。通过采用这种形式主义，我们调查的期望约束的参数表征的原始功率谱，特别是专注于频谱指数ns及其运行α s和β s。我们表明，未来对来自小晕的21 cm线涨落的观测，结合宇宙微波背景，可能会探测到这些运行为α s <$O（10 − 3）和β s <$O（10 − 4）。本文还讨论了它对非均衡模型检验的意义。
. Measurements of 21 cm line fluctuations from minihalos have been discussed as a powerful probe of a wide range of cosmological models. However, previous studies have taken into account only the pixel variance, where contributions from different scales are integrated. In order to sort out information from different scales, we formulate the angular power spectrum of 21 cm line fluctuations from minihalos at different redshifts, which can enhance the constraining power enormously. By adopting this formalism, we investigate expected constraints on parameters characterizing the primordial power spectrum, particularly focusing on the spectral index n s and its runnings α s and β s . We show that future observations of 21 cm line fluctuations from minihalos, in combination with cosmic microwave background, can potentially probe these runnings as α s ∼ O (10 − 3 ) and β s ∼ O (10 − 4 ). Its implications to the test of inflationary models are also discussed.