Mapping the dark energy with varying alpha

Cosmological dark energy is a natural source of variation of the fine structure constant. Using a model-independent approach we show that once general assumptions about the alpha-varying interactions are made, astronomical probes of its variation constrain the dark-energy equation of state today to...

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Bibliographic Details
Published in:Physics letters. B 2004-01, Vol.578 (3-4), p.235-240
Main Authors: Parkinson, David, Bassett, Bruce A., Barrow, John D.
Format: Article
Language:English
Subjects:
Astronomy
Dark matter (stellar, interstellar, galactic, and cosmological)
Earth, ocean, space
Exact sciences and technology
Fundamental astronomy and astrophysics. Instrumentation, techniques, and astronomical observations
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Summary:Cosmological dark energy is a natural source of variation of the fine structure constant. Using a model-independent approach we show that once general assumptions about the alpha-varying interactions are made, astronomical probes of its variation constrain the dark-energy equation of state today to satisfy −1
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2003.10.081