论文标题
与IA型超新星和无线电类星体的宇宙距离二元性关系无关的宇宙模型测试
Cosmological-model-independent tests of cosmic distance duality relation with Type Ia supernovae and radio quasars
论文作者
论文摘要
在本文中，我们通过两种独立于模型无关的方法，研究了最大的SNE IA（万神殿）和紧凑型无线电类别（QSO）样品的组合，研究了宇宙距离二元关系（CDDR）的可能偏差。 CDDR的偏差写入$ d_l（z）/d_a（z）（1+z）^{ - 2} =η（z）$和$η（z）= e^{τ（z）/2} $，带有$ f_1 $的参数（$ f_1 $） （1+Z）^{2ε_2} -1 $）。此外，为了比较两个结果距离，两种宇宙模型非依赖性方法，即，使用附近的SNE IA方法和GP方法与同一红移处的两个不同数据匹配。我们的发现表明，与文献中获得的结果相比，当使用最新的SNE IA和QSO样品时，精度有所提高。特别是，在附近的SNE IA方法的框架中，CDDR将以$δε_{1} = 0.013 $的精度约束，模型$ f_1 $和$δε_{2} = 0.018 $ in Model $ $ f_2 $。关于GP方法，人们观察到较大的数据大小会对CDDR参数产生更严格的约束。因此，伴随着宇宙学观察和分析方法的进一步发展，我们的分析提供了对宇宙较早阶段或至少涉及的新物理学的未指控不透明度来源的证据的见解。
In this paper, we investigate the possible deviations of the cosmic distance duality relation (CDDR) using the combination of the largest SNe Ia (Pantheon) and compact radio quasar (QSO) samples through two model-independent approaches. The deviation of CDDR is written as $D_L(z)/D_A(z)(1+z)^{-2}=η(z)$ and $η(z)=e^{τ(z)/2}$, with the parameterizations of $F_1$ ($τ(z) = 2ε_1 z$) and $F_2$ ($τ(z) = (1+z)^{2ε_2}-1$). Furthermore, in order to compare the two resulting distances, two cosmological-model-independent methods, i.e., the nearby SNe Ia method and the GP method are employed to match the two distinct data at the same redshift. Our findings indicate that, compared with the results obtained in the literature, there is an improvement in precision when the latest SNe Ia and QSO samples are used. Specially, in the framework of nearby SNe Ia method, the CDDR would be constrained at the precision of $Δε_{1} = 0.013$ in Model $F_1$ and $Δε_{2}=0.018$ in Model $F_2$. Regarding the GP method, one observes that a larger data size would produce more stringent constraints on the CDDR parameters. Therefore, accompanied by further developments in cosmological observations and the analysis methods, our analysis provides an insight into the evidence for unaccounted opacity sources at an earlier stage of the universe, or at the very least the new physics involved.
