Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2011-06-14
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
9 pages, 7 figures
Scientific paper
Amongst the multitude of inflationary models currently available, models that lead to features in the primordial scalar spectrum are drawing increasing attention, since certain features have been found to provide a better fit to the CMB data than the conventional, nearly scale invariant, primordial spectrum. In this work, we carry out an exact numerical analysis of two models that lead to oscillations over all scales in the scalar power spectrum. We consider the model described by a quadratic potential which is superposed by a sinusoidal modulation and the recently popular axion monodromy model. Since the oscillations continue even onto smaller scales, in addition to the WMAP data, we also compare the models with the small scale data from ACT. Though, both the models, broadly, result in oscillations in the spectrum, interestingly, we find that, while the monodromy model leads to a considerably better fit to the data in comparison to the standard power law spectrum, the quadratic potential superposed with a sinusoidal modulation does not improve the fit to a similar extent. We also carry out forecasting of the parameters using simulated Planck data for both the models. We show that the Planck mock data performs better in constraining the model parameters as compared to the presently available CMB datasets.
Aich Moumita
Hazra Dhiraj Kumar
Souradeep Tarun
Sriramkumar L.
No associations
LandOfFree
Oscillations in the inflaton potential: Exact numerical analysis and comparison with the recent and forthcoming CMB datasets does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Oscillations in the inflaton potential: Exact numerical analysis and comparison with the recent and forthcoming CMB datasets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oscillations in the inflaton potential: Exact numerical analysis and comparison with the recent and forthcoming CMB datasets will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-114384