Kavli Affiliate: Ke Wang
| First 5 Authors: Ke Wang, Lu Chen, , ,
| Summary:
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. We find that the constraints from these two epochs are not consistent
with each other by $4.64sigma$. The straightforward explanation for this
inconsistency is a varying fine-structure constant. Another explanation is that
the data we used are not good enough. We prefer the latter explanation and a
need for calibration of some important parameters involved in reconstructing
the reionization history.
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