论文标题
重力镜头时间延迟，作为探测精细结构常数的时间变化
Gravitational lens time-delay as a probe of a possible time variation of the fine-structure constant
论文作者
论文摘要
提出了一种基于大规模结构观察的新方法，以探测细胞结构常数的可能时间变化（$α$）。我们的分析基于强力透镜和IA型超新星观测的时间延迟。通过考虑一类失控的dilaton模型，其中精细结构常数的宇宙学演变由$ \ frac {δα}α\ of-cout-cout-c \ ln {（（1+z）} $，我们以$ 10^^{-2} $的级别（$γ$）的物理属性参数（$γ$）获得了限制。尽管我们的限制不及通过类星体光谱法获得的限制，但此处介绍的方法为$ \ frac {Δα}α\ neq 0 $在不同范围的红移范围内提供了新的界限。
A new method based on large-scale structure observations is proposed to probe a possible time variation of the fine-structure constant ($α$). Our analyses are based on time-delay of Strong Gravitational Lensing and Type Ia Supernovae observations. By considering a class of runaway dilaton models, where the cosmological evolution of the fine-structure constant is given by $\frac{Δα}α \approx -γ\ln{(1+z)}$, we obtain limits on the physical properties parameter of the model ($γ$) at the level $10^{-2}$ ($1σ$). Although our limits are less restrictive than those obtained by quasar spectroscopy, the approach presented here provides new bounds on the possibility of $\frac{Δα}α \neq 0$ at a different range of redshifts.
