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arXiv 2203.04835astro-ph.CO
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非平坦Super- $Λ{\rm CDM}$模型中的Hubble张力

The Hubble tension in the non-flat Super-$Λ{\rm CDM}$ model

Saroj Adhikari

摘要:

本文研究了非平坦Super- $Λ{\rm CDM}$模型中的Hubble张力。非平坦Super- $Λ{\rm CDM}$模型通过将空间曲率作为自由参数而扩展Super- $Λ{\rm CDM}$模型。Super- $Λ{\rm CDM}$模型扩展了标准的$Λ{\rm CDM}$宇宙学模型,通过额外的参数来解释原始波动中三谱的可能影响。在宇宙微波背景数据中,由于耦合长波长模式和短波长模式的三光谱,可以使用从理论功率谱改变观察到的角功率谱的参数来参数化这种效应。在这项工作中,我们对最近的普朗克2018年温度和偏振波动数据以及来自超新星数据的局部哈勃常数测量值进行了马尔可夫链蒙特卡罗(MCMC)数据分析,假设非平坦的Super- $Λ{\rm CDM}$模型。我们发现,有一个偏好的非零值的空间曲率参数$Ω_k$和超级$Λ{\rm CDM}$参数$A_0$在$Δχ^2$改善的水平约为23。

英文摘要:

We investigate the Hubble tension in the non-flat Super-$Λ{\rm CDM}$ model. The non-flat Super-$Λ{\rm CDM}$ model extends the Super-$Λ{\rm CDM}$ model by including the spatial curvature as a free parameter. The Super-$Λ{\rm CDM}$ model extends the standard $Λ{\rm CDM}$ model of cosmology through additional parameters accounting for the possible effect of a trispectrum in the primordial fluctuations. In the cosmic microwave background data, this effect can be parameterized using parameters that change the observed angular power spectrum from the theoretical power spectrum due to a trispectrum that couples long and short wavelength modes. In this work, we perform Markov Chain Monte Carlo (MCMC) data analysis on the recent Planck 2018 temperature and polarization fluctuations data and the local Hubble constant measurements from supernovae data assuming a non-flat Super-$Λ{\rm CDM}$ model. We find that there is a preference for non-zero values of the spatial curvature parameter $Ω_k$ and the Super-$Λ{\rm CDM}$ parameter $A_0$ at a level of $Δχ^2$ improvement of approximately 23.

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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