论文标题
研究宇宙曲率和暗能模型与最新的超新星样品之间的关系
Investigating the relationship between cosmic curvature and dark energy models with the latest supernova sample
论文作者
论文摘要
我们研究了宇宙曲率与深色能量模型（以下简称DE）与最近的IA型超新星（以下简称SNE IA）数据之间的关系，即包括1048 SNE IA的万神殿样本，$ 0.01 <z <z <2.3 $。我们获得了今天无量纲的空间曲率密度的测量，即$ω_{k0} = -0.062^{+0.189} _ { - 0.169}，-0.004^{+0.228} _ {+0.228} _ { - 0.134} $ 0.422^{+0.213} _ { - 0.338} $在68 \％置信度（Cl）分别在$λ$ CDM，$ ϕ $ cdm（即标量范围的dark Energy）的情况下，$λ$ cdm（即$ω$ cdm $ω$ cdm and $ω___________________a$ cdm）。在$λ$ CDM型号的情况下，Pantheon样本首选封闭的宇宙，这与Planck CMB光谱相一致。但是，来自万神殿样本的$ω_{k0} $的不确定性比普朗克数据大约8倍，因此前者支持一个封闭的宇宙，其CL远低于后者。 Pantheon样本以$ \ sim $ 32 \％和$ \ sim $ 78 \％cls支持开放的空白样本，在$ω$ CDM和$ω_0Ω_A$ CDM型号中。在这些型号中，$ ϕ $ CDM模型是最强烈支持平坦宇宙的模型。它表明$ω_{k0} $显着取决于所采用的暗能量模型，并且$ω__{k0} $与de状态方程之间存在负相关。
We investigate the relationship between the cosmic curvature and the model of dark energy (hereafter DE) with the recent Type Ia supernovae (hereafter SNe Ia) data, i.e., the Pantheon sample including 1048 SNe Ia with $0.01 < z < 2.3$. We obtain the measurements of the dimensionless spatial curvature density today, i.e., $Ω_{k0} = -0.062^{+0.189}_{-0.169}, -0.004^{+0.228}_{-0.134}, 0.127^{+0.280}_{-0.276}$ and $0.422^{+0.213}_{-0.338}$ at 68\% confidence level (CL), respectively, in the scenarios of $Λ$CDM, $ϕ$CDM (i.e., scalar field dark energy), $ω$CDM and $ω_0ω_a$CDM models. In the scenario of $Λ$CDM model, a closed universe is preferred by the Pantheon sample, which is consistent with that from the Planck CMB spectra. However, the uncertainty of $Ω_{k0}$ from the Pantheon SNe sample is about 8 times larger than that from the Planck data, so the former one supports a closed universe at a much lower CL than that from the latter one. An open unverse is supported by the Pantheon sample at $\sim$32\% and $\sim$78\% CLs, respectively, in the $ω$CDM and $ω_0ω_a$CDM models. Among these models, the $ϕ$CDM model is the one which supports the flat universe most strongly. It shows that $Ω_{k0}$ is significantly dependent on the adopted model of dark energy, and there is a negative correlation between $Ω_{k0}$ and the equation of state of DE.
