arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2011.06881astro-ph.CO
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宇宙距离-对偶关系的距离-偏差一致性和模型无关检验方法

A Distance-Deviation Consistency and Model-Independent Method to Test the Cosmic Distance-Duality Relation

C. C. Zhou, J. Hu, M. C. LI, X. Zhang, G. W. Fang

摘要:

提出了一种距离偏差一致性和模型无关性的宇宙距离对偶关系(CDDR)检验方法。该方法在两个方面值得注意:首先,使用距离偏差一致性方法配对子样本:而不是配对红移偏差小于\textbf{value}的子样本,例如$\left\vert Δz\right\vert <0.005$。子样本之间的红移偏差随着红移而减小,以确保距离偏差保持不变。该方法在高红移处选择更多的子样本,直到$z=2.16$,并提供120个子样本对。第二,模型无关方法涉及最新的$1048$ Ia型超新星(SNe Ia)和$205$强引力透镜系统(SGLS)数据集,分别用于获得光度距离$D_L$和角直径距离比$D_A$。与模型无关的方法,CDDR,SNe Ia光曲线,和SGLS的参数同时拟合。\textbf{The result shows}表明,对于$\frac{D_L}{D_A}{(1 + z)^{ - 2}} =1+ ηz$表,在1 $σ$置信水平下对$η= 0.047^{+0.190}_{-0.151}$和CDDR进行了验证。

英文摘要:

A distance-deviation consistency and model-independent method to test the cosmic distance duality relation (CDDR) is provided. The method is worth attention on two aspects: firstly, a distance-deviation consistency method is used to pair subsamples: instead of pairing subsamples with redshift deviation smaller than a \textbf{value}, say $\left\vert Δz\right\vert <0.005$. The redshift deviation between subsamples decreases with the redshift to ensure the distance deviation stays the same. The method selects more subsamples at high redshift, up to $z=2.16$, and provides 120 subsample pairs. Secondly, the model-independent method involves the latest data set of $1048$ type Ia supernovae (SNe Ia) and $205$ strong gravitational lensing systems (SGLS), which are used to obtain the luminosity distances $D_L$ and the ratio of angular diameter distance $D_A$ respectively. With the model-independent method, parameters of the CDDR, the SNe Ia light-curve, and the SGLS are fitted simultaneously. \textbf{The result shows} that $η= 0.047^{+0.190}_{-0.151}$ and CDDR is validated at 1$σ$ confidence level for the form $\frac{D_L}{D_A}{(1 + z)^{ - 2}} =1+ ηz$.

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。

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