JWST [O III] doublet measurements at redshifts 7.19 and 8.47 give Δα/α values consistent with no evolution, and a claimed 95% upper limit ζ ≤ 3.92×10^-7 on the dark energy-electromagnetic coupling.
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JWST observations constrain the time evolution of fine structure constants and dark energy - electromagnetic coupling
JWST [O III] doublet measurements at redshifts 7.19 and 8.47 give Δα/α values consistent with no evolution, and a claimed 95% upper limit ζ ≤ 3.92×10^-7 on the dark energy-electromagnetic coupling.