Length of inflation and WMAP data in the case of power-law inflation

2005/06/21 by Shiro Hirai, Hirai, Shiro, Tomoyuki Takami +1
Earth and Planetary Sciences · Physics and Astronomy · #Cosmology and Gravitation Theories #Geophysics and Gravity Measurements #Solar and Space Plasma Dynamics #astro-ph

paper · pdf · doi:10.48550/arxiv.astro-ph/0506479

38 pages,13 figures

arxiv created 2005/06/21 · arxiv updated 2009/12/01

Abstract

The effect of the length of inflation on the power spectra of scalar and tensor perturbations is estimated using the power-law inflation model with a scale factor of a(t) = t^q. Considering various pre-inflation models with radiation-dominated or matter-dominated periods before inflation in combination with two matching conditions, the power spectrum of curvature perturbations at large scales is calculated. Comparison of the derived angular power spectrum with the Wilkinson Microwave Anisotropy Probe (WMAP) data reveals a possibility that the WMAP can be explained by the finite length of inflation model if the length of inflation is near 60 e-folds and q>200.

Related

• Pre-inflation models and WMAP data
• Effect of initial condition of inflation on power and angular power spectra in finite slow-roll inflation
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• Comparing and combining Wilkinson Microwave Anisotropy (WMAP) probe results and Large Scale Structure