arXiv 2104.062022021-04astro-ph.CO

宇宙距离对偶关系与强引力透镜幂律密度剖面

On the cosmic distance duality relation and the strong gravitational lens power law density profile

F. S. Lima, R. F. L. Holanda, S. H. Pereira, W. J. C. da Silva

备注：: 8 pages, 4 figures, I table, Accepted for publication in the JCAP
发表信息：: JCAP08(2021)035
DOI：: 10.1088/1475-7516/2021/08/035

摘要：

在过去的二十年里，随着强大的新的空间和地面望远镜的出现，许多新的强引力透镜（SGL）系统被发现。透镜质量模型（通常是幂律质量模型）对宇宙学参数约束的影响最近在文献中进行了研究。本文利用SGL系统和Ia型超新星观测资料，探讨了在不同透镜质量间隔下，幂律质量密度剖面（$ρ\propto r^{-γ}$）与宇宙距离对偶关系（CDDR）$D_L(1+z)^{-2}/D_A=η(z)=1$是否一致。（已获得CDDR有效性的验证显著取决于所考虑的晶状体质量间隔：具有$σ_{ap} \geq 300$ km/s子采样（其中$σ_{ap}$是透镜视恒星速度色散）与CDDR有效性完全一致，具有中间$σ_{ap}$值的子样本（$200 \leq σ_{ap} < 300)$ km/s与$η=1$略微一致，最后，具有低$σ_{ap}$值（$σ_{ap} < 200$ km/s）的子样本排除了具有高统计置信度的CDDR有效性。因此，如果以CDDR为保证，我们的结果表明，使用单一密度分布不适合描述具有低$σ_{ap}$值的晶状体，它只是对具有中间质量间隔的晶状体的近似描述。}

英文摘要：

Many new strong gravitational lensing (SGL) systems have been discovered in the last two decades with the advent of powerful new space and ground-based telescopes. The effect of the lens mass model (usually the power-law mass model) on cosmological parameters constraints has been performed recently in literature. In this paper, by using SGL systems and Supernovae type Ia observations, we explore if the power-law mass density profile ($ρ\propto r^{-γ}$) is consistent with the cosmic distance duality relation (CDDR), $D_L(1+z)^{-2}/D_A=η(z)=1$, by considering different lens mass intervals. { It has been obtained that the verification of the CDDR validity is significantly dependent on lens mass interval considered: the sub-sample with $σ_{ap} \geq 300$ km/s (where $σ_{ap}$ is the lens apparent stellar velocity dispersion) is in full agreement with the CDDR validity, the sub-sample with intermediate $σ_{ap}$ values ($200 \leq σ_{ap} < 300)$ km/s is marginally consistent with $η=1$ and, finally, the sub-sample with low $σ_{ap}$ values ($σ_{ap} < 200$ km/s) ruled out the CDDR validity with high statistical confidence. Therefore, if one takes the CDDR as guarantee, our results suggest that using a single density profile is not suitable to describe lens with low $σ_{ap}$ values and it is only an approximate description to lenses with intermediate mass interval. }

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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