Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1847758 | Nuclear Physics B - Proceedings Supplements | 2009 | 6 Pages |
Abstract
If dark energy couples to the fields of the standard model we can hope to detect or constrain it through non-gravitational effects. If the dark energy field couples to photons it behaves as an Axion-Like-Particle (ALP). ALPs mix with photons in the presence of magnetic fields and hence affect astronomical observations. We show that empirically established luminosity relations can be used as a new test for ALPs and that when applied to observations of active galactic nuclei this is highly suggestive of the existence of a very light ALP.
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