论文标题
整个电离历史记录中的精细结构常数的一致性测试
Consistency test of the fine-structure constant from the whole ionization history
论文作者
论文摘要
在宇宙学中，精细结构常数会影响整个电离史。但是，以前的作品仅限于重组时代，并对精细结构常数产生各种强大的限制。在本文中，我们还考虑了电离时期，并对整个电离历史记录的细胞结构常数进行一致性测试。根据Planck 2018的数据组合，BAO数据，SNIA样品，来自UV和IR测量的SFR密度以及$ Q_ \ text {hii} $约束，我们发现重组期间的精细结构常数的约束是$α_ {\ text {rec}}/α_ {\ text {em}} = 1.001494^{+0.002041} _ { - 0.002063} $及其在Reionization Epoch期间的对应物为$α_ {\ text {rei}}/α_ {\ text {em}} = 0.854034^{+0.031678} _ { - 0.027209} $ at 68 $ \％$ c.l ..它们与彼此不一致。这种差异的保守解释是我们使用的数据中存在一些问题。我们更喜欢对重建电离历史的一些重要参数的校准。
In cosmology, the fine-structure constant can affect the whole ionization history. However, the previous works confine themselves to the recombination epoch and give various strong constraints on the fine-structure constant. In this paper, we also take the reionization epoch into consideration and do a consistency test of the fine-structure constant from the whole ionization history. From the data combination of Planck 2018, BAO data, SNIa samples, SFR density from UV and IR measurements, and the $Q_\text{HII}$ constraints, we find the constraint on the fine-structure constant during the recombination epoch is $α_{\text{rec}}/α_{\text{EM}}=1.001494^{+0.002041}_{-0.002063}$ and its counterpart during the reionization epoch is $α_{\text{rei}}/α_{\text{EM}}=0.854034^{+0.031678}_{-0.027209}$ at 68$\%$ C.L.. They are not consistent with each other by $4.64σ$. A conservative explanation for such a discrepancy is that there are some issues in the data we used. We prefer a calibration of some important parameters involved in reconstructing the reionization history.
