Making waves on CMB power spectrum and inflaton dynamics

Abstract

We discuss cosmic microwave background anisotropies in models with an unconventional primordial power spectrum. In particular, we consider an initial power spectrum with some ``spiky'' corrections. Interestingly, such a primordial power spectrum generates ``wavy'' structure in the CMB angular power spectrum.

Figures (2)

• Figure 1: The CMB angular power spectrum with the primordial spectrum Eq. (\ref{['eq:P_s']}). The model parameters and cosmological parameters are given in the text. The binned WMAP data is also plotted.
• Figure 2: The difference in $C_l$ between with and without spiky correction terms. The model and cosmological parameters are the same as in the upper panel of Fig. \ref{['fig:cl']}.