The WMAP normalization of inflationary cosmologies

Details The WMAP normalization of inflationary cosmologies The WMAP normalization of inflationary cosmologies

2006-07-13

arxiv.org/abs/astro-ph/0607275v1

Phys.Rev.D74:083512,2006

Astronomy and Astrophysics

Astrophysics

4 pages RevTex4 with two figures

Scientific paper

10.1103/PhysRevD.74.083512

We use the three-year WMAP observations to determine the normalization of the matter power spectrum in inflationary cosmologies. In this context, the quantity of interest is not the normalization marginalized over all parameters, but rather the normalization as a function of the inflationary parameters n and r with marginalization over the remaining cosmological parameters. We compute this normalization and provide an accurate fitting function. The statistical uncertainty in the normalization is 3 percent, roughly half that achieved by COBE. We use the k-l relation for the standard cosmological model to identify the pivot scale for the WMAP normalization. We also quote the inflationary energy scale corresponding to the WMAP normalization.

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