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López Maroto, Antonio and Beltrán Jiménez, José and Koivisto, Tomi S. and Fonseca Mota, David (2009) Perturbations in electromagnetic dark energy. Journal of Cosmology and Astroparticle Physics (10). ISSN 1475-7516
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Official URL: http://dx.doi.org/10.1088/1475-7516/2009/10/029
Abstract
It has been recently proposed that the presence of a temporal electromagnetic field on cosmological scales could explain the phase of accelerated expansion that the universe is currently undergoing. The field contributes as a cosmological constant and therefore, the homogeneous cosmology produced by such a model is exactly the same as that of Lambda CDM. However, unlike a cosmological constant term, electromagnetic fields can acquire perturbations which in principle could affect CMB anisotropies and structures formation. In this work, we study the evolution of inhomogeneous scalar perturbations in this model. We show that provided the initial electromagnetic fluctuations generated during inflation are small, the model is perfectly compatible with both CMB and large scale structure observations at the same level of accuracy as Lambda CDM.
Item Type: | Article |
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Additional Information: | © 2009 IOP Publishing Ltd and SISSA. |
Uncontrolled Keywords: | Microwave-Anisotropy-Probe, Equation-of-State, 5-Year Wmap Data, Magnetic Fields, Supernovae, Inflation, Cosmology, Universe, Vector, Models |
Subjects: | Sciences > Physics |
ID Code: | 26497 |
Deposited On: | 07 Aug 2014 09:48 |
Last Modified: | 31 Dec 2020 00:03 |
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