论文标题
微波背景温度测量的宇宙学影响
Cosmological impact of microwave background temperature measurements
论文作者
论文摘要
宇宙微波背景温度是可观察到的基石天体物理。它的现值受到严格的约束，但是它的红移依赖性（现在可以在红移$ z \ sim6.34 $）上确定，这也是对基本宇宙学的重要探测。我们表明，其约束功率现在与其他背景宇宙学探针相当，包括IA型超新星和哈勃参数测量值。我们使用三个模型来说明这一点，每种模型基于不同的概念范式，旨在解释宇宙的最新加速度。我们发现，对于$λ$ CDM的参数扩展，温度和宇宙学数据的组合显着改善了对模型参数的约束，而对于没有$λ$ CDM的替代模型，此数据组合将它们排除在外。
The cosmic microwave background temperature is a cornerstone astrophysical observable. Its present value is tightly constrained, but its redshift dependence, which can now be determined until redshift $z\sim6.34$, is also an important probe of fundamental cosmology. We show that its constraining power is now comparable to that of other background cosmology probes, including Type Ia supernovae and Hubble parameter measurements. We illustrate this with three models, each based on a different conceptual paradigm, which aim to explain the recent acceleration of the universe. We find that for parametric extension of $Λ$CDM the combination of temperature and cosmological data significantly improves constraints on the model parameters, while for alternative models without a $Λ$CDM limit this data combination rules them out.
