Inflation model constraints from the Wilkinson Microwave Anisotropy Probe three-year data

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

11 pages, 6 figures

Scientific paper

10.1103/PhysRevD.74.023502

We extract parameters relevant for distinguishing among single-field inflation models from the Wilkinson Microwave Anisotropy Probe (WMAP) three-year data set, and also from WMAP in combination with the Sloan Digital Sky Survey (SDSS) galaxy power spectrum. Our analysis leads to the following conclusions: 1) the Harrison--Zel'dovich model is consistent with both data sets at a 95% confidence level; 2) there is no strong evidence for running of the spectral index of scalar perturbations; 3) Potentials of the form V \propto \phi^p are consistent with the data for p = 2, and are marginally consistent with the WMAP data considered alone for p = 4, but ruled out by WMAP combined with SDSS. We perform a "Monte Carlo reconstruction" of the inflationary potential, and find that: 1) there is no evidence to support an observational lower bound on the amplitude of gravitational waves produced during inflation; 2) models such as simple hybrid potentials which evolve toward an inflationary late-time attractor in the space of flow parameters are strongly disfavored by the data, 3) models selected with even a weak slow-roll prior strongly cluster in the region favoring a "red" power spectrum and no running of the spectral index, consistent with simple single-field inflation models.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Inflation model constraints from the Wilkinson Microwave Anisotropy Probe three-year data 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 Inflation model constraints from the Wilkinson Microwave Anisotropy Probe three-year data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Inflation model constraints from the Wilkinson Microwave Anisotropy Probe three-year data will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-264815

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.