2017/06/30 by Hao Wei, Dong-Ze Xue
Physics and Astronomy · #gr-qc #astro-ph.CO #hep-th
paper · pdf · doi:10.1088/0253-6102/68/5/632
published as Commun. Theor. Phys. 68 (2017) 632-640 · 13 pages, 5 figures, 1 table, revtex4; v2: appendix removed, Commun. Theor. Phys. in press; v3: published version. arXiv admin note: text overlap with arXiv:1605.04571
arxiv created 2017/11/15 · arxiv updated 2017/11/16
In this work, we consider the so-called Λ(α)CDM cosmology with Λ∝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" Λ (equivalently the vacuum energy), and the varying α is driven by a subdominant scalar field ϕ coupling with the electromagnetic field. The observational constraints on the varying α and Λ∝α-6 models with various couplings BF(ϕ) between the subdominant scalar field ϕ and the electromagnetic field are considered.