Fine-structure variable?

Antoinette Songaila () and Lennox L. Cowie ()
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Antoinette Songaila: Antoinette Songaila and Lennox L. Cowie are at the Institute for Astronomy, University of Hawaii
Lennox L. Cowie: Antoinette Songaila and Lennox L. Cowie are at the Institute for Astronomy, University of Hawaii

Nature, 1999, vol. 398, issue 6729, 667-668

Abstract: Over the entire history of the Universe it is possible that even the known physical constants are not truly constant. The fine-structure constant — which characterizes the strength of the attraction between electrons and photons — is predicted by some theories to vary over time. New data from quasar spectra provide an upper limit on such variation.

Date: 1999
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DOI: 10.1038/19426

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