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arXiv 1006.4181astro-ph.CO
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原始重力波化石及其在暴胀测试中的应用

Primordial gravity wave fossils and their use in testing inflation

Kiyoshi Wesley Masui, Ue-Li Pen

摘要:

本文描述了一种新的效应,即原始重力波在宇宙的大尺度结构中留下永久的特征。在微扰理论中,这种效应发生在二阶,并且对不同尺度上的微扰产生的阶数敏感。我们得出的一般预测与未来的实验效果的可探测性,并考虑通过21厘米线的预再电离气体的观测。结果表明,平方公里阵列将无法与当前的宇宙微波背景对暴胀产生的原始重力波波的约束相竞争。然而,通过这种效应,一个更未来的实验可以提供对张量模式的最高最终灵敏度,甚至可能测量张量谱指数。因此,这是对暴胀范式的一种潜在的定量探索。

英文摘要:

A new effect is described by which primordial gravity waves leave a permanent signature in the large scale structure of the Universe. The effect occurs at second order in perturbation theory and is sensitive to the order in which perturbations on different scales are generated. We derive general forecasts for the detectability of the effect with future experiments, and consider observations of the pre-reionization gas through the 21 cm line. It is found that the Square Kilometre Array will not be competitive with current cosmic microwave background constraints on primordial gravity waves from inflation. However, a more futuristic experiment could, through this effect, provide the highest ultimate sensitivity to tensor modes and possibly even measure the tensor spectral index. It is thus a potentially quantitative probe of the inflationary paradigm.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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