后期暗能量参数化能否调和哈勃张力?

Mingjian Zhang, Li Chen, Maoyou Yang, Junmei Wang
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引用次数: 0

摘要

在本文中,我们构建了十个暗能量模型,以检验它们是否能调和哈勃张力,以及参数化对其影响有多大。为了提供一个公平的测试,模型的形式非常丰富,包括分数形式、对数形式、指数形式、反指数形式和几个非参数化模型。我们使用的数据集是来自pl2020的宇宙微波背景(CMB)功率谱数据的NPIPE管道、来自Ia型超新星的Pantheon+样本以及重子声振荡。他们的MCMC计算暗示,对于四个参数化暗能量模型,暗能量从$w<-1$转移到$w>-1$。然而,他们无法很好地协调哈勃张力。重要的是,我们发现w<-1$的幽灵般的暗能量最能把哈勃张力降低到0.1808/sigma$。然而,AIC分析表明,这种缓解是以高AIC为代价的。我们还研究了构造对状态方程导数$dw/da$、宇宙密度参数、CMB功率谱$C^{TT}$和物质谱$P(k)$的影响。我们还发现哈勃张力可能与再电离过程有关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Whether the late dark energy parameterization can reconcile the Hubble tension?
In this paper, we construct ten dark energy models to test whether they can reconcile the Hubble tension and how much is it affected by parameterization. To provide a fair test, the models are rich including fractional form, logarithm form, exponential form, inverse exponential form and several non-parameterized models. The dataset we use are the NPIPE pipeline of cosmic microwave background (CMB) power-spectrum data from \pl2020, Pantheon+ samples from Supernovae Type Ia, and baryon acoustic oscillation. They MCMC calculation implies the dark energy transferring from $w< -1$ to $w > -1$, for the four parameterized dark energy models. However, they are unable to reconcile the Hubble tension well. Importantly, we find that the phantom-like dark energy with $w < -1$ best can reduce the Hubble tension to $0.1808\sigma$. However, the AIC analysis indicates that this alleviation is at the cost of high AIC. We also investigate the effect of constructions on the derivative of equation of state $dw/da$, cosmic density parameter, CMB power spectrum $C^{TT}$ and matter spectra $P(k)$. We also find that Hubble tension may be related to the reionization process.
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