arXiv 1702.082442017-02-27astro-ph.CO

宇宙加速膨胀的有力证据

Strong evidence for an accelerating universe

Balakrishna S. Haridasu, Vladimir V. Luković, Rocco D'Agostino, Nicola Vittorio

发表信息：: A&A 600, L1 (2017)
DOI：: 10.1051/0004-6361/201730469

摘要：

最近对超新星Ia数据的分析声称宇宙加速的“边缘”（$\sim3σ$）证据。这一结果已经补充了一个非加速$R_{h}=ct$宇宙学，这是一个有效的替代$Λ$ CDM模型。在本文中，我们使用相同的分析表明，一个非边际的证据，实际上是found.We比较标准弗里德曼模型的$R_{h}=ct$宇宙学的补充SN Ia数据与重子声学振荡，伽马射线暴和观测哈勃数据集。我们还研究了幂律模型，这是一个功能推广的$R_{h}=ct$。我们发现，晚时间加速的证据是无法反驳的，在4.56 $σ$置信水平单独从SN Ia数据，并在一个更强的置信水平（$5.38σ$），从我们的联合分析。而且，非加速$R_{h}=ct$模型不能与具有$Δ(\text{AIC})\sim30$的$Λ$ CDM进行统计比较。

英文摘要：

A recent analysis of the Supernova Ia data claims a 'marginal' ($\sim3σ$) evidence for a cosmic acceleration. This result has been complemented with a non-accelerating $R_{h}=ct$ cosmology, which was presented as a valid alternative to the $Λ$CDM model. In this paper, we use the same analysis to show that a non-marginal evidence for acceleration is actually found. We compare the standard Friedmann models to the $R_{h}=ct$ cosmology by complementing SN Ia data with the Baryon Acoustic Oscillations, Gamma Ray Bursts and Observational Hubble datasets. We also study the power-law model which is a functional generalisation of $R_{h}=ct$. We find that the evidence for late-time acceleration is beyond refutable at a 4.56$σ$ confidence level from SN Ia data alone, and at an even stronger confidence level ($5.38σ$) from our joint analysis. Also, the non-accelerating $R_{h}=ct$ model fails to statistically compare with the $Λ$CDM having a $Δ(\text{AIC})\sim30$.

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。

摘要：

英文摘要：

相关论文