论文标题
红移的演变和类星体光度相关性的非宇宙分散体
Redshift Evolution and Non-Universal Dispersion of Quasar Luminosity Correlation
论文作者
论文摘要
据报道，标准$λ$ CDM模型偏离了IA型超新星（SNE）和类星体（QSOS）的高红移哈勃图（$ \sim4σ$置信度）。在这项工作中，我们将页面近似（几乎独立于模型的参数化）和高质量的QSO样本结合在一起，以搜索偏差的起源。通过可视化$λ$ CDM型号和SNE+QSOS的边缘化$3σ$约束在页面空间中，我们确认，平面和非Flat Page Case中的SNE+QSOS约束都与标准的$λ$ CDM宇宙学处于显着紧张状态。接下来，我们从红移进化效应的角度研究了张力。我们发现，SNE+Low-Z QSO和SNE+High-Z QSOS校准的QSO相关系数$γ$分别显示了$ \sim2.7σ$和$ \sim4σ$张力，分别是平面和非flat Univers中的张力。在不同数据集之间的内在分散$δ$的紧张局势在平面和非燃料案例中均为$>4σ$。这些结果表明，QSO光度相关性遭受了明显的红移进化和非宇宙固有分散体。使用红移依赖性相关性构建QSO哈勃图可能会导致偏见。因此，$ \sim4σ$偏离标准$λ$ CDM的偏差可能起源于QSO光度相关性的红移进化效果和非宇宙分散，而不是新物理学。
The standard $Λ$CDM model is recently reported to deviate from the high-redshift Hubble diagram of type Ia supernovae (SNe) and quasars (QSOs) at $\sim4σ$ confidence level. In this work, we combine the PAge approximation (a nearly model-independent parameterization) and a high-quality QSO sample to search for the origins of the deviation. By visualizing the $Λ$CDM model and the marginalized $3σ$ constraints of SNe+QSOs into PAge space, we confirm that the SNe+QSOs constraints in both flat and non-flat PAge cases are in remarkable tension with the standard $Λ$CDM cosmology. Next, we investigate the tension from the perspective of redshift-evolution effects. We find that the QSO correlation coefficient $γ$ calibrated by SNe+low-z QSOs and SNe+high-z QSOs shows $\sim2.7σ$ and $\sim4σ$ tensions in flat and non-flat universes, respectively. The tensions for intrinsic dispersion $δ$ between different data sets are found to be $>4σ$ in both flat and non-flat cases. These results indicate that the QSO luminosity correlation suffers from significant redshift evolution and non-universal intrinsic dispersion. Using a redshift-dependence correlation to build QSO Hubble diagram could lead to biases. Thus, the $\sim4σ$ deviation from the standard $Λ$CDM probably originates from the redshift-evolution effects and non-universal dispersion of the QSO luminosity correlation rather than new physics.
