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arXiv 2609.39432astro-ph.COgr-qchep-ph

探索暗时代21厘米涨落中的原初功率谱

Exploring the Primordial Power Spectrum with Dark-Age 21 cm fluctuations

Fumiya Okamatsu, Tomo Takahashi, Shuichiro Yokoyama

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中文总结 AI 辅助

本文研究暗时代21厘米功率谱作为探针,以探测原初功率谱的尺度依赖性并区分暴胀模型,发现其能探测CMB之外的尺度,且与CMB数据结合可显著改善约束。

中文摘要 AI 辅助

我们研究了未来暗时代21厘米功率谱观测在探测原初功率谱的尺度依赖性以及区分暴胀模型方面的潜力。我们发现,暗时代21厘米功率谱可以成为探测超出当前宇宙微波背景(CMB)观测范围尺度上的暴胀物理的有力工具。虽然预测几乎相同跑动谱指数的模型即使借助未来的21厘米观测也可能难以区分,但具有非传统尺度依赖性的模型可以被严格检验。我们进一步表明,将21厘米观测与CMB数据相结合,即使对于中等观测配置,也能显著改善约束。我们考察了枢轴尺度选择对所得约束的影响。

英文摘要

We investigate the potential of future observations of the Dark Ages 21 cm power spectrum to probe the scale dependence of the primordial power spectrum and distinguish between inflationary models. We find that the Dark Ages 21 cm power spectrum can serve as a powerful probe of inflationary physics on scales beyond the reach of current CMB observations. While models predicting nearly identical running spectral indices may remain difficult to distinguish even with future 21 cm observations, models with unconventional scale dependence can be stringently tested. We further show that combining 21 cm observations with CMB data can significantly improve the constraints, even for a moderate observational configuration. We examine the impact of the choice of pivot scale on the resulting constraints.

发表机构

  • Nihon University(日本大学)
  • Saga University(佐贺大学)
  • Nagoya University(名古屋大学)
  • The University of Tokyo(东京大学)

机构由 AI 辅助整理,请以论文原文为准。

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