CMB anisotropy induced by tachyonic perturbations of dark energy
- Russian Academy of Sciences, Institute for Nuclear Research (Russian Federation)
We consider the effects of possible tachyonic perturbations of dark energy on the CMB anisotropy. Such perturbations emerge, in particular, in models with phantom dark energy violating Lorentz invariance. Therefore, we discuss tachyonic perturbations with a Lorentz-violating dispersion relation. We show that the corresponding contribution to the CMB anisotropy can have an appreciable amplitude, while the angular spectrum has a distinct maximum. These predictions are compared with observational data. The tachyonic contribution slightly improves the agreement between the theory and observations, but this improvement is statistically insignificant and our analysis gives constraints on the tachyonic perturbation amplitude.
- OSTI ID:
- 21246953
- Journal Information:
- Journal of Experimental and Theoretical Physics, Vol. 108, Issue 2; Other Information: DOI: 10.1134/S1063776109020046; Copyright (c) 2009 Pleiades Publishing, Ltd; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
- Country of Publication:
- United States
- Language:
- English
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