各向异性对 wCDM 模型扩展的影响

IF 5 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Physics of the Dark Universe Pub Date : 2024-08-24 DOI:10.1016/j.dark.2024.101626

Vikrant Yadav , Santosh Kumar Yadav , Rajpal

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引用次数: 0

摘要

在本文中，我们从重子声学振荡（BAOs）、宇宙天文台（CC）、大爆炸核合成（BBN）、Pantheon Plus（PP）Ia型超新星汇编和SH0ES仙王座宿主距离锚等数据集中，推导出各向异性wCDM模型的观测约束。我们发现各向异性的数量级为10-13，在用BAO+CC+BBN+PP和BAO+CC+BBN+PPSH0ES数据组合进行的分析中，各向异性在wCDM模型中的存在使H0张力分别降低了2∼σ和1∼σ。在这两项分析中，暗能量的五价形式在95%CL时都被看好。

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Effects of anisotropy in an anisotropic extension of wCDM model

In this paper, we derive observational constraints on an anisotropic $w$ CDM model from datasets including Baryonic Acoustic Oscillations (BAOs), Cosmic Chronometer (CC), Big Bang Nucleosynthesis (BBN), Pantheon Plus (PP) compilation of Type Ia supernovae, and SH0ES Cepheid host distance anchors. We find that anisotropy is of the order $1 0^{- 13}$ , and its presence in the $w$ CDM model reduces the $H_{0}$ tension by $\sim 2 σ$ and $\sim 1 σ$ in the analyses with BAO+CC+BBN+PP and BAO+CC+BBN+PPSH0ES data combinations, respectively. In both analyses, the quintessence form of dark energy is favored at 95% CL.

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来源期刊

Physics of the Dark Universe ASTRONOMY & ASTROPHYSICS-

CiteScore

9.60

自引率

7.30%

发文量

118

审稿时长

61 days

期刊介绍： Physics of the Dark Universe is an innovative online-only journal that offers rapid publication of peer-reviewed, original research articles considered of high scientific impact. The journal is focused on the understanding of Dark Matter, Dark Energy, Early Universe, gravitational waves and neutrinos, covering all theoretical, experimental and phenomenological aspects.