论文标题
万神殿+层析成像和哈勃张力
Pantheon+ tomography and Hubble tension
论文作者
论文摘要
最近发布的IA型超新星（SNE IA）样品Pantheon+是万神殿的更新版本，具有非常重要的宇宙学含义。为了探索不同红移中数据集增强的约束功率和内部相关性的起源，我们分别对无齿轮宿主距离校准进行了全面的万神殿+样品进行全面的层析成像分析。具体而言，我们采用两种分配方法来分析万神殿+样品，即每个垃圾箱相等的红移间隔和相等的超新星数。对于相等的红移间隔的情况，将样品分为10个垃圾箱后，在[0.00122，\，0.227235]中的红移范围$ z \中的第一个垃圾箱$ z \ $ z \ $ z \ $ z \ $ z \ $ z \ $ z \ $ z \ $ z \ $ z \ $ z \ $ z \ $ z \ $ z \ $ z \ $ z \ $ z \ $ z \ $ z \ $ z \。对于相等的超新星编号，前三个低红移垃圾箱更喜欢大物质分数$ω_m$，只有第六箱才能提供相对较低的宇宙膨胀率$ H_0 $。对于这两种binning方法，我们都没有发现$ H_0 $和$ω_m$进化的明显证据，即$ 2 \σ$置信度。 SH0ES校准的包含可以显着压缩每个箱中宇宙背景动力学的参数空间。当不考虑校准时，将万神殿+样品与宇宙微波背景，巴里昂声学振荡，宇宙计时仪，星系聚类和弱透镜数据相结合，我们给出了最强的$ 1 \，σ$约束$ H_0 = 67.88 = 67.88 \ pm0.42 $ km km s $ km s $ 1}但是，校准的添加导致参数空间从组合约束和$ h_0 = 68.66 \ pm0.42 $ km s $^{ - 1} $ mpc $^{ - 1} $与Planck-2018的结果不一致的结果不一致。
The recently released Type Ia supernovae (SNe Ia) sample, Pantheon+, is an updated version of Pantheon and has very important cosmological implications. To explore the origin of the enhanced constraining power and internal correlations of datasets in different redshifts, we perform a comprehensively tomographic analysis of the Pantheon+ sample without and with the Cepheid host distance calibration, respectively. Specifically, we take two binning methods to analyze the Pantheon+ sample, i.e., equal redshift interval and equal supernovae number for each bin. For the case of equal redshift interval, after dividing the sample to 10 bins, the first bin in the redshift range $z\in[0.00122, \, 0.227235]$ dominates the constraining power of the whole sample. For the case of equal supernovae number, the first three low redshift bins prefer a large matter fraction $Ω_m$ and only the sixth bin gives a relatively low cosmic expansion rate $H_0$. For both binning methods, we find no obvious evidence of evolution of $H_0$ and $Ω_m$ at the $2\,σ$ confidence level. The inclusion of the SH0ES calibration can significantly compress the parameter space of background dynamics of the universe in each bin. When not considering the calibration, combining the Pantheon+ sample with cosmic microwave background, baryon acoustic oscillations, cosmic chronometers, galaxy clustering and weak lensing data, we give the strongest $1\,σ$ constraint $H_0=67.88\pm0.42$ km s$^{-1}$ Mpc$^{-1}$. However, the addition of the calibration leads to a global shift of the parameter space from the combined constraint and $H_0=68.66\pm0.42$ km s$^{-1}$ Mpc$^{-1}$, which is inconsistent with the Planck-2018 result at about $2\,σ$ confidence level.
