Quintessence and variation of the fine structure constant in the cosmic microwave background radiation

Greg Huey, Stephon Alexander, Levon Pogosian
2002 Physical Review D, Particles and fields  
We study dependence of the CMB temperature anisotropy spectrum on the value of the fine structure constant $\alpha$ and the equation of state of the dark energy component of the total density of the universe. We find that bounds imposed on the variation of $\alpha$ from the analysis of currently available CMB data sets can be significantly relaxed if one also allows for a change in the equation of state.
doi:10.1103/physrevd.65.083001 fatcat:4o2qwccik5bjvnqgwnbm5xcnsu