Abstract
In this work, we consider the so-called δ(α)CDM cosmology with δ α-6 while the fine-structure constant α is varying. In this scenario, the accelerated expansion of the universe is driven by the cosmological constant δ (equivalently the vacuum energy), and the varying α is driven by a subdominant scalar field coupling with the electromagnetic field. The observational constraints on the varying α and δ α-6 models with various couplings BF between the subdominant scalar field and the electromagnetic field are considered.
| Original language | English |
|---|---|
| Pages (from-to) | 632-640 |
| Number of pages | 9 |
| Journal | Communications in Theoretical Physics |
| Volume | 68 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 1 Nov 2017 |
Keywords
- cosmological constant
- fine-structure constant
- observational constraints
- observational cosmology
- vacuum energy