Intermediate inflation in light of the three-year WMAP observations

Details Intermediate inflation in light of the three-year WMAP observations Intermediate inflation in light of the three-year WMAP observations

2006-10-26

arxiv.org/abs/astro-ph/0610807v2

Phys.Rev.D74:127305,2006

Astronomy and Astrophysics

Astrophysics

4 pages RevTeX4 with one figure. Minor changes to match PRD accepted version

Scientific paper

10.1103/PhysRevD.74.127305

The three-year observations from the Wilkinson Microwave Anisotropy Probe have been hailed as giving the first clear indication of a spectral index n_s<1. We point out that the data are equally well explained by retaining the assumption n_s=1 and allowing the tensor-to-scalar ratio r to be non-zero. The combination n_s=1 and r>0 is given (within the slow-roll approximation) by a version of the intermediate inflation model with expansion rate H(t) \propto t^{-1/3}. We assess the status of this model in light of the WMAP3 data.

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