Bekenstein型模型的精细结构常数约束
Fine-structure constant constraints on Bekenstein-type models
摘要：
对无量纲基本耦合（如精细结构常数$α$）的稳定性进行天体物理学测试，是最近活动大大增加的一个领域，因为有迹象表明，时空可能在百万分之几的水平上发生变化。在这里，我们得到更新的约束Bekenstein-Sandvik-Barrow-Magueijo模型，这可以说是最简单的模型，允许$α$的变化。最近精确的光谱测量使我们能够改善以前的约束约一个数量级。我们简要地评论的依赖性的结果的数据样本，以及对未来的设施预期的改进。
英文摘要：
Astrophysical tests of the stability of dimensionless fundamental couplings, such as the fine-structure constant $α$, are an area of much increased recent activity, following some indications of possible spacetime variations at the few parts per million level. Here we obtain updated constraints on the Bekenstein-Sandvik-Barrow-Magueijo model, which is arguably the simplest model allowing for $α$ variations. Recent accurate spectroscopic measurements allow us to improve previous constraints by about an order of magnitude. We briefly comment on the dependence of the results on the data sample, as well as on the improvements expected from future facilities.
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