根据最近宇宙学的紧张局势，哈里森-泽尔多维奇光谱的回归

Q1 Earth and Planetary Sciences

Monthly Notices of the Royal Astronomical Society: Letters Pub Date : 2023-09-27 DOI:10.1093/mnrasl/slad137

Jun-Qian Jiang, Gen Ye, Yun-Song Piao

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引用次数: 7

摘要

标量微扰谱指数ns是暴胀理论为我们可观测宇宙设定的重要初始条件。根据Planck结果，电流约束为ns = 0.965±0.004，而在8.4σ显著性水平上排除了精确尺度不变的Harrison-Zeldovich谱ns = 1。但是，众所周知，标准λ冷暗物质模型受到哈勃张力的影响，其显著性水平为~ 5σ。这种不一致可能表明，最终散射面上的运动声视界实际上低于预期，因此似乎需要ns = 1的回归。在这里，根据最近的观测，我们发现了ns = 1宇宙存在的有力证据。我们证明，如果是这样，它将被CMB-S4实验最终证实。

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Return of harrison-zeldovich spectrum in light of recent cosmological tensions

ABSTRACT The spectral index ns of scalar perturbation is the significant initial condition set by inflation theory for our observable Universe. According to Planck results, current constraint is ns = 0.965 ± 0.004, while an exact scale-invariant Harrison–Zeldovich spectrum, i.e. ns = 1, has been ruled out at 8.4σ significance level. However, it is well-known that the standard Lambda cold dark matter model is suffering from the Hubble tension, which is at ∼5σ significance level. This inconsistency likely indicates that the comoving sound horizon at last scattering surface is actually lower than expected, which so seems to be calling for the return of ns = 1. Here, in light of recent observations we find strong evidence for a ns = 1 universe. And we show that if so, it would be confirmed conclusively by CMB-S4 experiment.

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来源期刊

Monthly Notices of the Royal Astronomical Society: Letters Earth and Planetary Sciences-Space and Planetary Science

CiteScore

8.80

自引率

0.00%

发文量

136

期刊介绍： For papers that merit urgent publication, MNRAS Letters, the online section of Monthly Notices of the Royal Astronomical Society, publishes short, topical and significant research in all fields of astronomy. Letters should be self-contained and describe the results of an original study whose rapid publication might be expected to have a significant influence on the subsequent development of research in the associated subject area. The 5-page limit must be respected. Authors are required to state their reasons for seeking publication in the form of a Letter when submitting their manuscript.