Constraining Quintessence with the New CMB Data
Astrophysics
2009-11-06 v2 High Energy Physics - Phenomenology
Abstract
The CMB data recently released by BOOMERANG and MAXIMA suggest that the anisotropy spectrum has a third peak in the range 800<l_3<900. A combination of this result with constraints from large-scale structure permit us to differentiate between different quintessence models. In particular, we find that inverse power law models with power \alpha >1 are disfavoured. Models with more than 5% quintessence before last scattering require a spectral index greater than 1. These constraints are compared with supernovae observations. We also show that the CMB alone now provides strong evidence for an accelerating universe.
Cite
@article{arxiv.astro-ph/0105457,
title = {Constraining Quintessence with the New CMB Data},
author = {Michael Doran and Matthew Lilley and Christof Wetterich},
journal= {arXiv preprint arXiv:astro-ph/0105457},
year = {2009}
}
Comments
5 pages, 5 figures, replaced with version which appears in journal. Discussion on supernovae bounds and references added